Results of ongoing research at Michigan State University indicate several available fungicides can significantly reduce brown rot in chestnut
Chestnut rots pose a serious threat to the global production of edible chestnuts (Castanea spp.)
significantly affecting their quality and marketability
caused by the fungus Gnomoniopsis smithogilvyi
smithogilvyi was first detected in Michigan in 2016
the incidence of brown rot has steadily increased with as much as 9% of the chestnuts processed by the largest cooperative in Michigan showing symptoms of brown rot at harvest
The disease is characterized by a gradual browning of the kernel that develops in the field or after harvest
Recent research at Michigan State University has identified several preventive fungicide treatments that can effectively reduce infection rates and overall disease severity
As the prevalence of this disease has increased around the world
researchers have been studying its life cycle and disease cycle to understand how and when the pathogen infects chestnuts
There are two types of infections in the disease cycle
The primary infection is caused by sexual spores that overwinter protected by a reproductive structure on dead plant material on the orchard floor
these sexual spores are released from the understory and create secondary infections that develop asexual spores which are spread by rain splash
wind and insects and cause new infections in a repeating cycle during the growing season
cool temperatures again trigger the development of overwintering spores
which then persist into the following growing season and start the cycle all over again
The spores from the secondary infection cycle can infect flowers
It is also important to note that the fungus can exist as an endophyte
not causing disease or symptoms—simply surviving on plant parts and debris
these endophytic populations become pathogenic when optimal conditions and opportunities for infection occur
rainfall and humidity levels coincide with female flower bloom
spores can move to and germinate on female flower parts
entering the plant through the flower and establishing infection in the developing nut embryo
Fifteen different fungicides were tested in the lab to determine their ability to reduce fungal growth
The fungicides were selected based on research regarding the infection cycle of G
difenoconazole and mefentrifluconazole) and Bacillus-based products were most effective at suppressing G
Seven fungicides were also tested under field conditions with a series of bloom-time applications
The results of these trials indicate that two applications
one at early bloom (Photo 2) followed by a second application two weeks later
There is evidence that a third application when the nut is ripening may further decrease disease levels in orchards experiencing high disease pressure from wet/warm weather conditions or historically high infection rates
Inspire Super (active ingredients difenoconazole and cyprodinil) and Tilt (active ingredient propiconazole) were the most effective at suppressing brown rot in the field trials
Bacillus subtilis fungicides and zinc or potassium phosphonate also significantly reduced disease levels
Despite phosphorus acid products showing lower fungicidal activity in the lab trials
This disparity between lab and field efficacy is likely because phosphorus acids work as defense inducers
which improve tree health and resistance to biotic factors and invitro trials were performed on petri plate colonies that don’t have the ability to replicate the chestnut tree’s response to the product
Because of the risk of resistance development
rotate each application between one of the conventional fungicides (Inspire Super or Tilt) and one of the foliar nutrients (potassium or zinc phosphonate)
keep trees properly pruned and fertilized to reduce brown rot infection
specifically the removal and proper disposal of plant debris (hot compost
bury or burn) is important to limiting overwintering spores and disease pressure in subsequent years
nuts should be collected as soon as possible to limit soil contact
Nuts should be transported to the processing plant and cooled as soon as possible to slow the development of any latent infections
Processors should limit the amount of humidity and water utilized during processing and storage to minimize disease development
This work is supported by the Midwest Chestnut Producers Council
Michigan Specialty Crop Block Grant Program and many Michigan growers
This work is also supported by the Crop Protection and Pest Management Program [grant no 2024-70006-43569] from the USDA National Institute of Food and Agriculture
or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S
Check out the MSU Fruit & Vegetable Crop Management Program
Issued in furtherance of MSU Extension work
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Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned
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The American chestnut is a lost Appalachian treasure
one Portuguese community holds close a relative of the bygone nut
By Caroline Hatchett
October/November 2024
The Portuguese word saudade expresses all the emotions mixed up with longing for place
Saudade—that feeling swept through me in Curral das Freiras
an interior valley on the Portuguese island of Madeira and a community defined by its isolation and principal crop
In the hamlet and on the surrounding steep slopes
I found chestnut reverence as I imagine it existed in Appalachia a century ago—in Western North Carolina where I camped every summer of my childhood and in the Tennessee mountains that produced my reserved
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Castanea dentata grew for forty million years in North America
the blight had decimated some four billion chestnut trees—and a way of life—as chronicled in Donald Davis’s book The American Chestnut
which I read on a direct flight from JFK to Madeira
Corkscrew roads delivered me from Madeira’s capital of Funchal to Eira do Serrado
I watched mist roll over volcanic peaks as if they were the Great Smokies
carved by millennia of erosion and rockslides
the only way out of the valley was to climb
at first under the shade of chestnut trees
The valley walls amplified the trail’s music: Pollinators buzzed over blackberry blossoms
a historian from the island’s Regional Directorate of Culture
a landowner bequeathed the valley to the Convent of Santa Clara
whose nuns ran a farming operation from afar
The sisters resided in the larger city of Funchal and paid foremen to oversee production; poor settlers worked the land and forfeited much of their harvest for the privilege of a homestead
the sisters fled to the valley to escape a pirate’s raid
I beheld the snaking trail I had just descended from the terrace of Sabores do Curral
The restaurant serves cane syrup–drizzled chestnuts
a rustic chestnut soup with pork and sweet potatoes
the owner of Vale das Freiras bottles sweet chestnut liqueur
I accessed a small chestnut museum with artifacts of a working life: baskets into which men thrashed off chestnut skins
Madeira’s earliest settlers brought the Castanea sativa variety with them to the island
It shares a common ancestor with the American chestnut
whose genetics split off soon before the two landmasses ripped apart
the town hosts a festival with every imaginable chestnut foodstuff
best for a day visit as part of a longer stay in Madeira
visit the church with Santa Clara enshrined in stained glass
Locals dammed a stream to form a swimming hole known as Poço dos Chefes; I bathed with a school of rainbow trout and sunned on the rocky banks
There are a few home rentals nestled in the valley
I slept in Funchal (ensconced in the luxury of the Savoy Palace hotel)
Families supplemented their diets with chestnuts
as well as wild foods whose harvest the nuns did not demand
Virgínia Camacho grew up among twenty-seven siblings and half-siblings here
She showed me how her mother cooked pots of an endemic tuber called brigalhó over a wood fire
She pressed until I accepted cordial glassfuls of homemade ginja
and she led me to a shed perched over her downstairs hearth
When I asked if she knew any chestnut songs
she belted out a tune in twangy Portuguese
Curral das Freiras’s remoteness preserved this folk culture—and most likely spared its chestnuts from disease
locals found that Asian chestnut gall wasps had invaded
A common root fungus has also plagued trees
a chestnut specialist from the Regional Directorate of Agriculture
says the cure for the latter must be applied tree by tree
many of which are too dangerous for her team or landowners of advanced age to access
the chestnut festival director imported 250 kilograms of nuts
conservationists in the States have worked to breed a blight-resistant American chestnut
Hopes surrounding a genetically modified tree were dashed just this year when researchers found that it was vulnerable to fungus
the Directorate of Agriculture has attacked the gall wasp by releasing a second parasitic wasp into the valley’s chestnut groves
It also launched a program to promote new plantings
and better irrigation; Portugal will modernize the valley’s chestnut processing facility to diversify output
Viera da Luz will know if they have eliminated the gall wasp
Dolly Parton’s Smoky Mountain wonderland still sparkles
These top-notch bakeshops let flour-free customers have their cake—and pies
The future of conservation in the South just got a little bit brighter—and not just for salamanders
but they’re the craftsmanship of local crustaceans called lawn lobsters
The drawls are receiving a lot of flak across the internet
but a North Carolina linguist argues they’re actually pretty accurate
It’s officially the holiday season, which means it’s the best time of the year to test your skills baking gingerbread cookies for the first time
and romanticize roasting chestnuts on an open fire
For the majority of us who don't have access to a personal hearth
the good news is: It’s easy to attain perfectly sweet
buttery chestnuts just from roasting them in your oven
We asked the experts to round up the best tips and tricks to make roasted chestnuts from the comfort of your own kitchen
“Feel them between your fingers and make sure that the skin is not too dry as well,” Hamm says
How do you cook chestnuts so they peel easily?Once you’ve brought the chestnuts home, rinse them of any debris. The next step is to score them. Cut an “X” through the shell of the chestnut, but make sure not to pierce the skin that lies underneath, explains Michelle Gooden
This is an important step not to skip — if you don’t score them
you risk the chestnuts exploding in your oven
soak the chestnuts in water for at least 1 hour
although you could even leave them overnight
Soaking the chestnuts helps them to get a little softer before roasting
It’ll also make it much easier to peel the skin off later on
To roast the chestnuts in the oven, start by heating your oven between 400 to 425 degrees Fahrenheit, Hamm says. Spread the chestnuts across a baking sheet
Pop them in the oven for about 10 to 25 minutes
To make sure the chestnuts are evenly roasted
How long you should leave them in for will depend on the size of your chestnuts (the smaller the size
If you leave the chestnuts in the oven for too long
Once the shells of the chestnuts start to pop open
you can season and eat to your personal preference,” says Gooden
Absolutely. Chestnuts pack a punch with a variety of vitamins and minerals that have antioxidant properties (think magnesium and potassium). These nutrients promote heart health by regulating your blood pressure and lowering your risk of cardiovascular diseases
Unlike most nuts, chestnuts are also lower in calories and fat
“They're also unique amongst other nuts because they provide a significant amount of vitamin C,” Hamm notes
This is particularly beneficial for boosting immunity and supporting skin health
Chestnuts also have a high fiber content, Gooden says. Foods high in fiber help slow the digestion of carbohydrates, which in turn can help control blood sugar levels. For this reason, chestnuts could be a great snack option for someone living with diabetes
Healthy snack ideas: Try out these nutritious pairings next time the hunger hits
[roasted chestnuts] still provide a great source of antioxidants and fiber
The American chestnut was once a dominant tree of the eastern U.S
known for its rot resistant wood and ample production of wildlife-supporting chestnuts
survivors still exist today in several national parks in the greater Washington
The American chestnut tree (Castanea dentata) once occupied forests as far south as central Alabama
and as far north as Maine and southern Ontario
they made up more than half the mass of living trees
the non-native chestnut blight fungus (Cryphonectria parasitica) was introduced and quickly spread through forests of the eastern U.S
almost all American chestnuts in their native range were dead
But because the blight fungus does not kill the root system of trees
American chestnuts persist today in natural areas as re-sprouts from blight-free root systems
and the fact that the National Capital Region (NCR) is part of its native range
many people are interested in bringing American chestnuts back to NCR forests
National Park Service staff from the National Capital Region Network
Inventory & Monitoring (NCRN I&M) program inventoried American chestnuts in eleven NCR parks in 2014
We collected location information for each living tree
measured diameter at breast height (dbh) of all stems greater than 1 cm dbh
classified each tree’s position in the forest caonpy
and recorded the visual presence of blight symptoms and reproductive structures including flowers and fruit
We found living American chestnut trees in every National Capital Region park except Antietam and Manassas (see table below)
Download the NPS app to navigate the parks on the go
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my mind was blown to learn what kind of man white women imagined when using the descriptor “tall
they’re just thinking of a strong-jawed guy who isn’t blond
an actor who looks as if he was sculpted from marble by the hands of a loving and generous god
He first captured my attention with his breakthrough role in John Singleton’s 1991 drama Boyz n the Hood
Then he was Lance Sullivan in the 1999 launch of The Best Man franchise
(If that role had been played by someone with even an ounce less charisma and onscreen presence
the character — a former rake who suddenly has concerns over his fiancée’s purity — would fall apart.) He appeared in a flurry of television parts in the aughts and 2010s — Nurse Jackie
Rosewood — but I always come back to his role in the 2001 film Two Can Play That Game
a war-of-the-sexes romantic comedy starring Vivica A
Fox as a high-powered professional woman who
comments on the tricks men play and how to combat them
and I wore that DVD out watching Fox’s character
the similarly accomplished attorney Keith Fenton (Chestnut)
and a great cast (Mo’Nique and Tamala Jones are highlights) into a delectable cocktail
But its greatest moments capture what has ultimately propelled Chestnut’s career-long position as a sex symbol: the particular way he looks at a woman
but with genuine respect — a combination that gives the impression that he truly loves being around us
the CBS series in which Chestnut plays — you guessed it — the hottest version of Dr
John Watson this side of Lucy Liu’s Elementary
who worked on Liu’s silly but surprisingly emotionally attuned Sherlock Holmes-inspired procedural
Watson is clearly aiming for a similar sentiment: It opens on the apparent death of Sherlock Holmes and Moriarty at Reichenbach Falls
He goes as far as to jump in the raging waters to save his friend but is left with a traumatic brain injury
Sherlock left his companion wealth and a medical clinic to run as he sees fit
navigating the ripple effects of his brain injury
making peace with the current state of his relationship with ex-wife Mary Morstan (Rochelle Aytes)
and running the clinic with a quippy set of underlings who are doctors who also do detective work
Does Watson take itself a touch too seriously in crucial moments of its premiere
Is the idea of casting Randall Park as Moriarty and asking him to play intimidating the height of comedy
But I am curious to witness how it all shapes up and whether it can calibrate its own sweetness and curiosity into a worthwhile brain-smoothing excursion
Let’s be honest: What’s keeping me engaged with the series is Chestnut
who is clearly having fun finding the cunning in a character like Watson
It helps that 31 minutes into the first episode
the writers find an excuse for Chestnut to take his shirt off
When I say I almost gasped looking at this 56-year-old man with abs upon abs
so cut it looks like touching his edges would draw blood
But what’s even more alluring is the regard and care behind Watson’s gaze
a dynamic that Chestnut easily communicates by simply holding eye contact with the authenticity of a real movie star
but only some of them thrive long enough to make a “medical drama with detective elements” feel like the sexiest thing on television
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The inaugural “Pennsylvania Chestnut Festival” took place Saturday at the Castanea Fire Company Picnic Grounds near Lock Haven
It’s meant to celebrate the area’s chestnut history and raise awareness for recovery efforts for the American chestnut tree
which is functionally extinct in North America
Two members of the Hooskow Chainsaw Carvers were outside the event carving wooden sculptures
The group travels to Clinton County every fall for the Chainsaw Carvers’ Event
A chainsaw carver at the Pennsylvania Chestnut Festival works on a sculpture of a squirrel holding a chestnut
were later available for sale at the event
and it looks like they’re doing a squirrel with a nut,” said John Gradel
He later confirmed they were carving a chestnut
Gradel said the township is named after Castanea dentata
which is the scientific name for the American Chestnut tree
people that have lived in the township for like 30 years didn’t realize what Castanea actually stood for,” Gradel said
Hundreds of people packed in to listen to live polka music
Bob Kennedy and Dan Gales worked the table selling those sample chestnuts
Kennedy and Gales are both from Lock Haven
and say they’ve eaten chestnuts their whole lives
“You got to soak them in salt water for about an hour,” Kennedy said
“Then you gotta score them to open up a little bit with a sharp knife
put them on a cookie sheet and bake them for 20 to 30 minutes.”
Kennedy said the chestnuts should pop open and be ready for eating
The Pennsylvania Chestnut Festival ran out of roasted chestnuts about an hour after opening
Visitors expressed disappointment when the polka band made the announcement
but some said it was a good sign that the festival was well-attended
Chestnuts are protected by a spiky outer layer and a shell
The festival ran out of roasted chestnuts about an hour after opening
There were several informational stands for people to learn more about chestnuts
“Chestnuts and other kinds of trees are a very important food source for wildlife
so we’re here representing that,” said Shawna Burkett
a lieutenant with the Pennsylvania Game Commission
Burkett said the Game Commission is working to introduce hybrid chestnut trees
Many of the chestnuts currently in the U.S
The American Chestnut Foundation also had a stand at the festival
“The chestnut tree has been reduced from a forest tree species to a forest shrub that often does not reproduce,” said Lake Graboski
a regional science coordinator with the foundation
“It is actually a functionally extinct species.”
He says a fungus introduced in the late 1800’s is to blame for the American Chestnut’s downfall
Graboski says people planted Japanese and Chinese chestnut trees that co-evolved with the fungus and were immune
But that fungus spread and destroyed American chestnuts from the inside
Graboski said there are some American chestnuts that have survived the blight
The American Chestnut Foundation had several chestnut samples on display showing their spiky outer layer
also known as “burs.” Photo: Sydney Roach / WPSU
“And so part of our mission in trying to breed trees that are resistant to the blight is
we’re looking for these trees and trying to cross them together to see if we can use that to help increase the chestnut’s blight resistance
A young chestnut tree infected with blight
The blight destroys the tree from the inside
Graboski said the American Chestnut Foundation wants to bring the tree back to its native range in the eastern United States
The foundation has a chapter headquartered at Penn State
“Our approach is to try to use every tool at our disposal,” Graboski said
Graboski said he’s hopeful for the chestnut’s future since the blight cannot kill its roots
organizers hope it will also expand in the years ahead with more decorations and maybe some local roasted chestnuts to enjoy
township officials say they’re putting together plans to celebrate the state’s oldest surviving American chestnut
The Pennsylvania Department of Conservation and Natural Resources recently discovered the two-foot-wide tree in nearby Sproul State Forest
Several vendors were set up at the Pennsylvania Chestnut Festival
including this stand which featured woodwork
31 January 2025 episode
Sydney Roach is a reporter and host for WPSU with a passion for radio and community stories
She's a graduate of Northern Cambria High School and Westminster College in New Wilmington
Ceredigion: On another warm autumn day before the grey blur of winter
I find that the September gales denied me my seasonal nutty snack
A mature sweet chestnut tree stands by the path at the field edge
boat-shaped leaves ease downwards through the still air
but this year I have arrived too late to enjoy the plump astringent nuts that fall in groups from spiked cases
Unlike its toxic cousin the horse chestnut
the nuts make excellent eating – but only a few specimens remain here
the gales of September having brought many of the seed cases to the ground before their time
This tree evokes memories of almost forgotten autumns
of days with my father when as a child I explored the depths of the New Forest on Sunday forays
finding with friends hidden stands of sweet chestnut in the Teign valley of Devon
emerging with pockets bursting with nuts to roast – hissing – on the fire
after carefully piercing them to avoid explosions
dropping away from the obvious trail and across to the southern bank of the river
the matted vegetation and fallen tree trunks that almost block the stream speak of a less ordered landscape
Parties of sparrows bicker loudly in the undergrowth while ducks feed and preen in the pools and riffles that signify the old age of the river
The grey cobble bank of Tanybwlch beach marks the seaward end of the Afon Ystwyth
and I pause here to note the freshening breeze and darker cloud moving up from the south
There is a sense of a change in the season
that this could be the last of the warm autumn days before we descend into the wet grey blur of early winter
Country diary is on Twitter/X at @gdncountrydiary
Under the Changing Skies: The Best of the Guardian’s Country Diary, 2018-2024 is published by Guardian Faber; order at guardianbookshop.com and get a 15% discount
The story below is from our March/April 2025 issue. For more stories like it, Subscribe Today
A farm in Stewartsville will become a sanctuary for native trees
It is not every day that one has the opportunity to rescue a family treasure and
improve the environment and learn a little history
His ancestors’ 225-acre farm in Bedford County slipped out of his immediate family’s ownership a few years ago — going to a cousin — and he was presented with the opportunity to retrieve it — and the old homeplace — which still stands
He leapt at the opportunity and has created a sanctuary for newly-planted trees
creating a semblance of the native forest that once was a part of the property
These 8,500 new trees will not be for sale when they mature
They will remain a haven for wildlife and for the cleaner natural environment that has been replaced for many years
are in the process of restoring the farm to the land his ancestors cleared 175 years ago
About 35 acres of it will be home to native trees
some of which will be American Chestnut hybrids that were erased by a disease
The first owner of the farm was Ferguson’s third great-grandfather
Helping to sustain the farm were a group of slaves — a fact that makes both Ferguson and Dykes uncomfortable
Among the enslaved was a woman who was Booker T
and descendants remain involved with the property
“The Dearing land and the people who lived on it represent Virginia’s complex racial dynamic and the growing commitment among institutions and individuals to better represent Black history,” says Ferguson
most of which is provided by six government agencies (including the USDA)
“We are in the final stages of conservancy easement,” Ferguson says
“It’s been around for a while,” says Ferguson
“I’m told this is the single biggest individual project [of this type] anybody can remember.” Many of the others are corporation-generated
Mark Ferguson and Alexander Dykes work to restore the farm on the land of his ancestors
Ferguson and Dykes are small business professionals who own a makers’ market in downtown Roanoke and an online magazine
Ferguson has written for various publications about Appalachia for 14 years
The couple counts “the thrill of rebuilding a forest” among their blessings
The story above is from our March/April 2025 issue. For more stories like it, Subscribe Today
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black stem borer activity has likely started in southern Lower Peninsula
The current weather pattern has been colder than in the northern half of the Lower Peninsula and the Upper Peninsula and warmer than normal in southern Michigan
There has also been a strong north/south gradient in terms of precipitation; the heaviest precipitation has been across the Upper Peninsula and the north/central Lower Peninsula
only received less than 0.25 inches over the last week
there is a big difference between southern lower Michigan
while the Upper Peninsula is behind normal
there is chance for precipitation in upper Michigan that will move southeast (0.25-0.5 inches)
a high pressure system will move in and bring cooler Canadian air
The 6-10-day projections call for warmer and slightly wetter than normal conditions
although this could change slightly since the 8-14-day forecast calls for near normal temperatures and potentially drier conditions for the first week of May
Special thanks to Jeff Andresen. View the most recent MSU agriculture weather forecast
It is a busy time of the year for orchard activities. Growers may be removing mouse guards, dusting off the irrigation and preparing for fertilizer application. This is also a great time to collect soil tests samples and paint trunks to reduce southwest disease
Growers should also be kickstarting their scouting program
specifically looking for overwintering mite populations and trapping for black stem borer
pick up a commercial test at your local Extension office
Black stem borer will infest and damage a wide variety of woody plant species
Black stem borers are attracted to small trees with less than a 4-inch trunk diameter and stressed trees that produce ethanol
Female borers create tunnels in trunks to lay their eggs
These tunnels damage the tree’s ability to translocate water and nutrients
Overwintering adults become active in late April or early May after one or two consecutive days of 68 F or higher
often coinciding with blooming forsythia or greater than 100 GDD50
Adult black stem borers are very small (0.08 inches long)
Use a simple ethanol baited trap to monitor for activity starting in mid-April
Traps should be placed near wooded areas adjacent to the orchard and at a height of 1.6 feet
Hand sanitizer is an easy and accessible bait but should be refreshed every few days
Traps can consist of just a pop bottle (or similar container) with around a 0.5-1 cup of hand sanitizer and an entry hole added
Traps can be hung along the orchard perimeter
vulnerable trees and positive trap catches or a history of damage will need to apply a trunk spray to prevent damage
The time to spray an insecticide for this pest is when females are flying in the spring and before the colonize trees
Young trees near the perimeter of orchards
it is impossible to visually monitor adults to determine the optimum time to apply an insecticide
so trapping as described above is recommended to detect adult activity and apply treatment
Pyrethroid insecticides applied as trunk sprays have shown the most promise in reducing the number of new infestations within a season. For a list of registered pyrethroids for use in Michigan chestnuts, refer to the Michigan Chestnut Management Guide
European red mite is another pest to be on the lookout for early in the season
European red mites overwinter as eggs in bark crevices and bud scales and are the most commonly observed species in Michigan chestnut orchards
about the size of the head of a pin with a single stipe or hair that protrudes from the top (this is not always visible)
Eggs can be viewed with a hand lens or the naked eye once you have established what you are looking for
Scout for overwintering eggs and early nymph activity in the spring to assess population levels in the coming season
overwintering eggs hatch and nymphs move onto the emerging leaves and start feeding
Adult European red mite are red in color and have hairs that give them a spikey appearance
Adult and nymph feeding occurs primarily on the upper surface of the leaves
This first generation is the slowest of the season and typically takes a full three weeks to develop and reproduce
This slow development is due to the direct link between temperature and mite development
can complete their lifecycles much faster with as little as 10 days between generations under ideal conditions
Consider documenting the levels of predacious mites in your orchard
If healthy populations of mite predators exist
they will continue to feed on plant parasitic eggs and nymphs and can be an effective component of your mite management program
Predaceous mites are smaller than adult European red mite and twospotted spider mite
but they can be seen with a hand lens and typically move very quickly across leaf surfaces
If you are unsure what is causing symptoms in the field, you can submit a sample to MSU Plant & Pest Diagnostics. Visit their webpage for specific information about how to collect, package, ship and image plant samples for diagnosis. If you have any doubt about what or how to collect a good sample, please contact the lab at 517-432-0988 or pestid@msu.edu
This work is supported by the Crop Protection and Pest Management Program [grant no 2024-70006-43569] from the USDA National Institute of Food and Agriculture
As we head into the winter months
there’s no better time to enjoy chestnuts as a sweet
or a flavor-enhancing ingredient in hearty soups and stuffing
Chestnuts are incredibly nutrient-dense. They have a distinct nutritional profile that differs from most other nuts: they’re rich in antioxidants
it’s no secret that chestnuts can offer immense benefits for your health
we asked the experts to break down everything you need to know
Chestnuts are considered to be a nutritious, low calorie snack option. A typical one ounce serving of chestnuts is 70 calories, which is roughly equivalent to eating a piece of fruit, says Emily Wilcox Gier
a registered dietitian and associate professor of Practice and Dietetic Internship Director
Division of Nutritional Sciences at Cornell University
Chestnuts can be enjoyed either raw or cooked — the biggest difference between the two is their flavor profile
you may find them to be a little bitter (this is because chestnuts contain tannic acid)
Roasting or boiling chestnuts brings out their sweetness
and it can also make them a little bit softer and easier to digest
Are chestnuts good for you?“Chestnuts are interesting
because they're different from other nuts nutritionally,” Wicox Gier says
An ounce of chestnuts has a very low caloric content in comparison to other nuts
Perhaps one of the most surprising benefits of chestnuts is that they have a rich antioxidant profile. Chestnuts are rich in vitamin C, says Dave Bridges
an associate professor of Nutritional Sciences in the School of Public Health at the University of Michigan
From a single serving of chestnuts, you can reach 11% of your vitamin C daily requirement, says Bridges. Chestnuts are also an excellent source of polyphenols such as gallic acid and ellagic acid, he adds. These antioxidants are integral for fighting free radicals
Chestnuts contain 1.5 grams of fiber per serving
Eating chestnuts can be beneficial to obtaining some fiber
but it is still not nearly enough to meet the daily recommended fiber intake of 25 grams for adults
Chestnuts also contain small amounts of magnesium
Chestnuts’ nutritional benefits largely stay the same no matter if they’re raw or cooked
Boiling chestnuts may reduce their concentration of water soluble vitamins (such as vitamin C)
When comparing chestnuts to almonds side by side
one is not necessarily healthier than the other — it really just depends on what your health goals are
Chestnuts and almonds have contrasting nutritional profiles
chestnuts have an incredibly low calorie content per volume
whereas an ounce of almonds is 170 calories
if you’re looking for a low-calorie food that will fill you up
Almonds have significantly more protein
you don't even get a gram of protein in one ounce of chestnuts
you take in six grams of protein,” Wilcox Gier says
Almonds also have about 45 times more fat than chestnuts
if somebody's looking for a snack that might sustain them a little bit longer
almonds might do a better job of that because of their fat and their protein content,” she says
while chestnuts have a vastly different nutritional profile when compared to other nuts
they still offer immense health benefits as a low-calorie
the next time you stop by your local supermarket
remember that chestnuts can be an excellent addition to a well-balanced diet
More: Pecans are a good snack, ingredient – but not great for this
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the non-native chestnut blight fungus (Cryphonectria parasitica) was introduced and quickly spread through the forests of the eastern U.S
because the blight fungus does not kill the root system of trees
"The American chestnut remains a symbol of both the loss of biodiversity due to human actions and the potential for restoration and recovery through scientific advancement
which we are thrilled to take part in." -Edgar Deskins
The Midwest Chestnut Producers Council annual educational and business meeting will take place Saturday
The Midwest Chestnut Producers Council (MCPC) Annual Meeting is held in collaboration with Michigan State University Extension and includes grower networking opportunities
educational presentations and a brief business meeting
This meeting serves as the premier networking and educational event for the Midwest chestnut industry
The meeting is open to the public and offers a great opportunity for both novice and veteran growers to learn from each other and MSU faculty.
Who: Current or prospective chestnut producers
What: Midwest Chestnut Producers Council Annual Meeting
Where: Clarksville Research Center located at 9302 Portland Road in Clarksville
The cost of registration is $20 for MCPC members in good standing and $75 for nonmembers
Dues and registration fees must be paid at the door
Attendees may sign up to join the MCPC at the event
Register now
For more information about the program or registration please contact Erin Lizotte at taylo548@msu.edu
Michigan State University is committed to providing equal opportunity for participation in all programs
services and activities. Accommodations for persons with disabilities may be requested by contacting Erin Lizotte two weeks prior to the start of the event at 231-944-6504 or taylo548@msu.edu
Requests received after this date will be honored whenever possible.
Michigan State University Extension programs and materials are open to all without regard to race
Vegetable & Organic Horticulture Management Program
Post-doc researcher Giorgia Bastianelli continues long tradition of chestnut research at MSU
An official website of the United States government
KENTUCKY—American chestnut once spanned more than 200 million acres from Maine to Georgia and as far west as the Mississippi River
The American Chestnut Foundation is working to return this tree to its former glory
One of their significant goals is to find a genetic variant of the American chestnut that can survive the chestnut blight
the foundation recently partnered with the USDA Forest Service to plant 64 seedlings in Land Between the Lakes National Recreation Area with the goal of creating a strain of American chestnut that is unique
“This project seeks to preserve that unique DNA,” said Darnell
who also explained that Land Between the Lakes offered a unique opportunity for the project
American chestnuts in Land Between the Lakes are among the farthest western examples of the species
making their DNA different from other strains
The foundation is interested in having as large a bank of chestnut DNA as possible to look for aspects that can be combined to produce that resistance
That interest has brought them to the Land Between the Lakes National Recreation Area in Kentucky
“Wild chestnuts in the LBL forest are unique,” said Ken Darnell
president of The American Chestnut Foundation’s Kentucky Chapter
There are American chestnuts with DNA that the foundation does not have large amounts of
The best way to accomplish that DNA acquisition
is to collect some actual nuts from the trees
partners mapped existing chestnuts and took cuttings from existing American chestnut trees in Land Between the Lakes
which were transported to the Forest Service’s Southern Research Station nursery in Mississippi to be grafted with young sprouts of Chinese chestnuts
The trees’ symbiotic relationship allows the American chestnut to grow as long and as quickly as possible
thanks to the Chinese chestnut’s resistance to root diseases
The aim is to keep the seedlings alive for at least five to seven years to provide full American nuts
The grafted chestnut trees are expected to succumb to the blight in a few years
they don’t have additional levels of resistance against it
the hope is that these trees will produce fertile nuts before potentially succumbing to blight
it’s extremely rare to find a mature American chestnut within its native range due to a fungus called the Asian chestnut blight
The blight infects tree trunks and kills everything above the infection point
the fungus is not able to survive underground to infect the root system
it is frequently then reinfected by spores of the blight
since the trees are not pure American chestnut
the hybrid trees and roots will be dug up and burned as they die
Allowing the hybrids to grow would only increase the number of Chinese chestnuts and go against the goal of restoring full American chestnuts
This cycle of death and rebirth has kept the American chestnut from being completely extinct
but keeps it at a state of functional extinction
as the American Chestnut Foundation puts it
One aspect of that functional extinction is that very few nuts are produced anymore
since it is rare for the resprouted chestnut trees to survive long enough to produce nuts
The ecological and cultural importance of the American chestnut tree has made restoration efforts a priority for federal agencies
Together they have been working for decades to create a blight-resistant tree that will help to restore the once-great American chestnut population
You can learn more about American chestnuts by watching this Forest Service video about the American chestnut. Additionally, The American Chestnut Foundation released a documentary about its work, titled Rescuing the American Chestnut
The dates displayed for an article provide information on when various publication milestones were reached at the journal that has published the article
activities on preceding journals at which the article was previously under consideration are not shown (for instance submission
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most of these hybrids were created by a first generation crossbreed followed by crossbreeding the hybrid with pure American Chestnut and repeating the process multiple generations until a hybrid is created having 90+% (don’t remember the exact figure) American Chestnut
some of those are almost entirely American Chestnut
but still retain genes for blight resistance
I’m in west suburbs of Raleigh and we have chestnuts through our woods here
but in the reservoir park I live next time
I have 5 on my property that I grew from nuts on an old chestnut tree on my property
They are easy to sprout but hard to raise due to deer loving the leaves and new growth branches
I had an arborist visit my property to look at some oak trees
He found the Chestnut blight growing on the base of several oak trees around the property
He said that it did not damage the oaks but was a source of future fungus to any nearby chestnuts
I happened to have a bag of FeSO4 which I used as a fungicide on my yard
I applied it to the base of my oaks and within 2 days it had killed all of the fungus
but having lived with 6 chestnut trees on the property… I feel chestnuts belong roasting on a open fire… a big open bonfire
One of the worst trees to have on your property
people seriously need to know the truth about this tree before they put one on their property
Pretty much the whole season of the tree is a pain
In spring you get the fuzzy bits that cover everything and dye everything including your car paint permanently brown if you don’t remove the fuzz immediately everyday
then when the chestnuts fall especially the Chinese and Hybrids
they dent the crap out of your car and hurt like hell when they hit you
I’ve had to pull the spikes out of my toddler so many times and it’s like performing surgery (worse than stepping on a cactus)
If you don’t pick up every single spikey shell they stay in the yard for years and break off in your foot
And unless you extremely stay on top of it guaranteed your chestnut tree will get infected by chestnut weevils
Then your picked buckets of chestnuts will have grubs coming out of them and filling your living room floor
If you feel you must have a chestnut tree please for your family’s sake make sure it’s on the edge of the property and not near any normal traveled pathways
If you are really interested in learning the facts about efforts to restore the American Chestnut
you should join the Facebook page American Chestnut Research and Restoration
And then read all the old posts and the new posts to correct many of the misconceptions and incorrect facts posted in the article and the comments
There aren’t any American Chestnuts that are proven to be blight resistant
However there are individuals trees that appear to have recovered from the blight
But none have been proven to be blight resistant
https://www.facebook.com/groups/esfchestnut/
Our chestnut trees on my property have been pruducind chestnuts since 1964 and still going strong
I have a true American Chestnut tree in our yard
My Father grew one from his tree which came from a sprout coming out of a stump of tree in the forest
He was a science/biology teacher and remembered the huge groves of American Chestnut trees before the blight hit
I live in Pennsylvania and am delighted to see the interest in this most majestic beneficial tree
the hybrids is how we got into this mess anyway- the Asian chestnut was sold here and infected the American chestnut with the blight to start with
they were able to track the demise outward from the delivery locations from one importer
Are these the same as what we in Ohio called “Buckeyes”
My mother and dad called them “conkers”
and would play a game with them threaded onto a piece of twine
trying to “conk” them together
They used to grow in local parks when I was growing up in the 50’s
I believe I may have located an American Chestnut (Castaneda dentata)
I obviously have never seen an authentic American Chestnut Tree
I would really love to see if there is anyone with more experience would like to see this tree
I have taken photos all year from flower until after hard frost
I also beat the deer and squirrels and got 1/2 bushel of nuts
These are not native American chestnuts (Castanea dentata) but most likely Chinese chestnuts (C
mollissima) or perhaps a hybrid F1 between the two
While some American chestnuts do manage to survive the blight
Genetically modified versions are very early stage and it will be quite a few years before either bioengineered or conventionally bred American chestnuts that resist the blight will be available – 5 years is very optimistic
And the othere is a chestnut tree that has survived the chestnut blight
An offshoot of an native american chestnut tree.I would go with the original.We have enough genetic engineered plants in this world
They are true American Chestnut trees from the Georgia grove
Try to plant the American trees not the Chinese hybrids
would be nice to hear about successful efforts in locating and breeding 100% genetically pure Castanea Dentata
give the real deal a chance; we shouldn’t give up on them
Would like to plant a few trees in the cuyahoga valley national park
I will never see them for I’m 79 years of age
but just knowing some one will be getting some will make me happy
And ground it’s the most healthy flour you can have
packaged roasted chestnuts are incredibly expensive while bulk chestnuts are seasonally available (and the roasting process is neither quick nor easy)
I welcome efforts that could lead toward more access to chestnuts
Are these the horse chestnuts of yesteryear that were nearly decimated by blight in the early 20th century
I am interested in purchasing 4-6 seedlings for planting in our area
to purchase some nuts or bare Roos plantings from you
Can I order nuts or bare roots plantings from you for that purpose
I would like to have a few seed or nuts to plant will gladly pay for the trouble.pobox7: smithers,wv 25186thanks
I plan on planting an orchard when I retire in five years in Michigan
planted 2 trees a few yes ago both bare root about 4 feet high this year got 3/4 of a 5 gal bucket all big nuts.wiĺ never know how many we actually got because squirrel and chipmunk would beat us to them not sure if our deer got any .trees grew very fast now about 50 ft amazing..later planted 10 more not to many nuts yet about 30 feet .might have planted to close
I was surprised that The American Chestnut Foundation was not mentioned
Does this organization have any affliction
Are these chestnuts 100 % American Chestnut or a hybrid
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Joe James stands in front of a hybrid Chinese and American chestnut tree in his orchard in Seneca
James is working with the American Chestnut foundation to restore the tree to its former glory
A blight canker on one of Joe James' chestnut trees in Seneca
Chestnut seed on one of Joe James' hybrid chestnut trees on his orchard in Seneca
A young chestnut hybrid on Joe James' orchard in Seneca
The American chestnut dominated Appalachia and the eastern U.S
Christian spent six years in Myrtle Beach before moving to the Upstate
making a mess in the kitchen or running around Spartanburg
SENECA — Joe James was a little boy when he first saw a mountainside full of dead trees
He was tagging along with his father on a sales trip through Tennessee and North Carolina when they pulled over to catch the view
what caused all these trees to die?’ he asked
It wasn’t lightning. His dad told him of the once-dominant American chestnut and the blight that wiped them out
Somebody needs to do something about it,’” James recalled
Between 1904 and the late 1940s, about 4 billion American chestnuts were lost to an invasive airborne fungus from Asia. The chestnut blight was introduced in New York
likely from an imported Asian-variety chestnut
The fungus had evolved alongside the Asian trees
Its range at one point extended as far south as the Florida panhandle
Phytophthora cinnamomi — root rot — killed many southern trees
likely spreading through North America in the 1700s
The parasite lives underground but can’t survive freezing weather
so the mountain and northern trees were unaffected
choking the trees off from their roots until they died
loggers and others cut as many down as they could before they were rendered useless
A few large trees escaped blight and loggers alike
Some that died have continued to shoot up new sprouts from their root systems in places unaffected by phytophthora
The country’s largest trees still drop thousands of nuts a year in Washington and Oregon
planted by westward-bound settlers in the 1800s
Now 78 years old, James is helping the American Chestnut Foundation bring back a version of the American chestnut that can survive in the wild
The surviving trees’ progeny are critical to their effort
His 250-acre farm in Seneca has around 600 hundred hybrid chestnuts with genes from American and Chinese trees
which he’s breeding and culling to create predominately American lineages imbued with the Asian trees’ resistance to blight and root rot
The retired doctor has grown more than 33,000 trees since he started experimenting in the late 1980s
“For something that important that did so much to be gone forever
it’d be well worth it to do for future generations.”
Few remember how Appalachian forests looked before the blight
“I think it’s really hard to comprehend what it would mean, how dramatic it was,” said Don Hagan, a Clemson University forestry professor. “It’d be like ‘What if all of the oaks died?’”
Chestnuts made up 1 in 4 trees in their native habitat and were one of the biggest and fastest-growing trees in the eastern forests
The largest among them could grow more than 100 feet tall with trunks 15 feet wide
Each tree dropped thousands of energy-rich seeds every year
the nuts would pile ankle-deep on the forest floor
Every omnivore and herbivore ate them — including people
which don’t produce a consistent number of acorns each season
It provided a valuable food source in the fall when other vegetation was wearing thin
“I call it the wheat of the forest,” James said
The people of Appalachia fattened their cattle on the chestnuts
They gathered and sold them by the trainload to the north where they’d be roasted and sold on street corners
Their lumber was used by carpenters of all sorts; their timber was used by tanning factories
They inspired one of the most popular Christmas songs of all time
So are most people who witnessed their greatness
who was a young man when the chestnuts disappeared
He was born in the 1920s and grew up in Hendersonville
“So he was sort of that link across generations where I could talk to him and he could talk about what it was like," Hagan said
there are only around 4 million left in their native range
Save for a few dozen large trees that managed to escape the blight
most that exist today are new shoots that have sprouted from the roots of long-dead giants
“The statistic that’s important is that over 95 percent of those are less than one inch in diameter,” said Jamie Van Clief
American Chestnut Foundation’s southern regional science coordinator
Van Clief learned about the chestnut at the University of Vermont
where she studied forestry and environmental science
The scale of the devastation inspired her to intern with the American Chestnut Foundation
After stints with the Peace Corps and USDA
“It has been named one of the greatest ecological disasters for a reason,” she said
“It really stuck with me because the scale of 4 billion trees is incredible.”
the American Chestnut Foundation has led efforts to bring back a tree with blight and phytophthora resistance
the trees need diverse genetic backgrounds with all the best American traits from different regions
trees in the north tended to flower later in the spring than their southern counterparts
A new crop of trees would need genetic backgrounds from both
The trees also need to retain their resistance to indigenous diseases that they’d have to deal with in the wild
A restoration of this scale has never been attempted before
so the foundation is using a variety of approaches including breeding
genetic modification and a method of infecting and weakening the blight called hypovirulence
"We’re throwing a bunch of things at the wall
scientists take genes that imbue blight resistance and insert them into the American tree’s genome
but researchers are still figuring out which resistance genes produce the best results
they’ve found that it’s not just one or two genes responsible for blight resistance
Far fewer genes are associated with resistance to phytophthora
James believes he’s maybe 20 years away from getting a hybrid tree that could survive in the wild
fewer of his hybrid trees are dying than when he started in the late 1980s with a bunch of hybrid seeds that succumbed to root rot
“I think the chestnut right now is emerging from the state of being susceptible to root rot to a non-susceptible state,” James said
It takes the tree out of the gene pool before it can provide any nuts or flowers
Breeding blight resistance is taking longer
James found a subset of his trees have some blight resistance
but thinks it will take several generations to establish it
“That’s gonna slow us down as far as bringing the tree back
for the tree to survive in the wild in any significant number
Everyone involved in the project is optimistic
Foresters have to take the long view and trust that the work they’re doing today will have an impact later on
“I don’t know if I will see chestnuts fully return to the East Coast in my time,” said Van Clief
“But the work that I’m doing today wouldn't have been possible without the people who have been doing this for the past 20 or 30 years.”
A human may get lucky to see a hundred years of age
The biggest American chestnuts could live several times longer
“What is important to remember is that we’re not on a human time scale,” Van Clief added
“Going through the multiple generations that are necessary to get this tree population to be resistant is gonna take tree time and not human time.”
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only for someone else to dismiss it as an “old chestnut”
Have you ever heard someone tell a tired old joke
Jokes aren’t the only thing to get labeled this way. Everything from well-trodden movie tropes to overplayed songs, old anecdotes, and trite clichés and stereotypes might be called a “chestnut”—anything, as the Merriam–Webster Dictionary puts it
that is “repeated to the point of staleness.” But where does this bizarre expression come from
The connection between chestnuts and old stories is far more recent, and though there are a few theories about its origin, experts believe the most probable is that this sense of chestnut first emerged in theatrical circles in the United States in the mid-19th century
it is exactly six years since … I mounted a mule at Barcelona
from the thick boughs of a cork-tree—PABLO: A chestnut
this is the twenty-seventh time I have heard you relate this story
Although the play wasn’t too popular with critics
it still proved enough of a success with audiences to warrant a move to the United States
And so long as theatrical folklore is to be believed
it was the cast of one of the American productions that apparently gave us our old chestnut
In an article in the in the mid-1880s
Hanley recounted that he had been touring a production of The Broken Sword when one of the actors began telling a funny anecdote backstage
“Everybody interrupted with shouts of ‘Chestnut!’ ” Hanley explained
“It clung to the company all the season and
Admittedly, there are a couple of rival versions of this tale
each mentioning a different actor in a different city
and a different touring performance of Broken Sword
There are also competing theories about chestnut being a corruption of the words just not; the family name Chestnut; or stories involved patrons of a theater on Chestnut Street in Philadelphia
But it seems that Dimond’s play is the most likely origin of our old chestnut—unless all of these stories turn out to be nothing more than old chestnuts themselves
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Jokes aren’t the only thing to get labeled this way. Everything from well-trodden movie tropes to overplayed songs, old anecdotes, and trite clichés and stereotypes might be called a “chestnut”—anything, as the Merriam–Webster Dictionary puts it
The connection between chestnuts and old stories is far more recent, and though there are a few theories about its origin, experts believe the most probable is that this sense of chestnut first emerged in theatrical circles in the United States in the mid-19th century
Although the play wasn’t too popular with critics
In an article in the in the mid-1880s
Admittedly, there are a couple of rival versions of this tale
There are several theories as to where this phrase came from—and none of them involves the nuts
highlights different aspects of the region’s food ecosystem
This week she offers a recipe for chestnut gnocchi with Italian sausage and escarole
Click here to subscribe. For previous stories, go here
don’t even get me started.) I make gnocchi fairly often
but these gnocchi are a little different — they’re made from chestnuts that I gathered in a cemetery
just be sure you’re not picking up horse chestnuts
THANK YOU to everyone who shared the “Superabundant” newsletter over the past few weeks — and WELCOME to our new subscribers
Your fall and winter are about to get a whole lot cozier
(Sorry not sorry in advance for the heavy-handed use of food puns.)
Hungry for more? Get a bit of Italian Portland culinary history on the Produce Row episode of “Superabundant”
The news sparked a huge discussion among OPB staffers about favorite greasy spoons and breakfast diner standbys (shouts went out to Cameo Cafe and Tom’s Pancake House in the Metro Area
but I have to add nods to Southern Oregon too — the chicken fried steak at Kozy Kitchen and the Apple Peddler’s biscuits and gravy are both solid)
Readers: If your favorite diner closed, what dish would you miss the most? Let me know in an email and maybe I can hack the recipe for a future newsletter
Last week I received an email from Lisa Power, who manages the seed library at Banks Public Library and had just read the story about Oregon beans that OPB reran
She had some of the beans from the now-defunct Ayers Creek Farm (the owners
but because these varieties are no longer being grown commercially she wanted to reserve them for gardeners who’d be willing to be seed stewards — to preserve the Boutards’ legume legacy and keep these unique varieties alive
Seeds of the varieties Gaston Borlotto, Wapato White and Othello’s Pebbles went to Charlene Murdock
co-founder of the teaching farm Foodways at Nana Cardoon
the seeds made their way to the environmental education group EdenAcres
to grow in their B-street Learning Garden in Forest Grove (home of the Tuality Plains Seed Library) and Sarah Newton
who runs Fox Farm at Free Orchards Elementary School in Cornelius
News of the “Ayers Creek Collection” spread like fireweed among seed savers
and other varieties developed by the Boutards have surfaced
a former Ayers Creek Farm employee is now managing the bean collection at B-street
I’ll be over here crying my eyes out because it’s just so heartwarming to see folks care this much about a humble bean
Find out more about these organizations at the links below:
City of Banks Seed Library
Foodways at Nana Cardoon
B-street Learning Garden
Fox Farm at Free Orchards Elementary School
it was lovely to hear from so many of you last week — I’ll be mailing out garlic chive seeds to a whopping 20 readers
✨ I saw a buy one/get one deal on pork tenderloins (I’m powerless against a BOGO!) so I tied and rubbed one down with coarse salt
black pepper and caraway seeds and roasted it on a bed of sliced onions and dried pears with a splash of stale rosé
When it was almost done I smeared it with homemade fig-plum sweet and sour sauce to glaze
The dried pears soaked up all the flavorful juices and got really jammy with the onions and fruit sauce
✨ In the spirit of clearing freezer space (OK
I may have slightly overdone it on the BOGO pork)
I pulled a tub of golubtsy filling that I’d stashed for a rainy day
but instead of using the seasoned rice and ground beef to make actual cabbage rolls
I just simmered chopped cabbage in the tomato sauce and then stirred in the rice/meat mixture
Sour cream and chopped fresh dill went on top
✨ I was sort of craving yakisoba but wanted a less gloopy-sweet sauce, so I made the Filipino version, pancit Canton, instead. (Happy Filipino-American History Month
but was also able to disappear a couple leftover grilled hot Hungarian sausages
The sausages worked pretty well in the dish since they’re not that different from longanisa
but I added a little five spice to give it more of a lap cheong flavor
Recipe: Chestnut gnocchi with Italian sausage and escaroleChestnut gnocchi with Italian sausage and escarole — foraging your own chestnuts isn’t required
You haven‘t really lived until you’ve nibbled a warm chestnut straight from its shell
earthy-sweet flavor and soft texture like a roasted yam
a chestnut party definitely pairs better with a good old-fashioned bobbing for apples (or caramel apples
if slobbering into a communal bucket of floating Honeycrisps conflicts with your COVID-19 protocols)
Adding to the atmosphere was that we were foraging in the cemetery near my house without even realizing chestnuts’ connection to spooky season
if you don‘t have the time or proclivity (or don’t feel like spending an hour peeling them)
peeled and vacuum-sealed or jarred chestnuts will work just as well
8 ounces roasted chestnuts (about 6.5 ounces peeled)
8 ounces Italian sausage (sweet or hot; bulk or links with casings removed)
½ cup finely grated crumbly cheese like Pecorino or Asiago cheese
Note: A previous version of this newsletter stated the Tuality Plains Seed Library was housed at Fox Farm; it’s located at B Street Learning Garden
Tags: Superabundant newsletter, Superabundant, Food, Recipes, Recipe, Food And Farms
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Michigan is the leading producer of commercial chestnuts in North America
chips for brewing beer and many more products
chestnut growers reported demand consistently exceeds their annual harvest
Given that most (90%) chestnuts consumed in the U.S
Michigan growers have ample opportunity to expand production to meet increasing domestic demands.
an increasing number of Michigan chestnut producers have experienced serious damage from the lesser chestnut weevil (Curculio sayi Gyllenhal)
This native insect likely evolved with American chestnut (Castanea dentata) but is now an important pest in chestnut orchards in many eastern states.
Adult beetles cause little harm but larvae
feed and develop inside chestnut kernels in fall
grub-like larva can destroy a chestnut (Figure 1)
and weevil larvae emerging from fresh chestnuts on countertops or shelves can wreck consumer confidence (Figure 2)
it is difficult to identify affected and healthy chestnuts without cutting kernels open to check for larvae.
This bulletin provides information about chestnut weevils in Michigan
Potential management options to reduce damage before and after chestnuts are harvested are also addressed.
Chestnut weevil adults congregate and mate on burs in September (Figure 3)
corresponding to approximately 2,500 cumulative degree-days (DD) using a threshold temperature of 50 degrees Fahrenheit (DD50F).
Adult female weevils use their specialized mouthparts at the end of their long snout to chew a hole through the bur and shell of the chestnut into the kernel
This leaves small black bruises on the shell of the nut (Figure 4C-D)
extend their ovipositor into the hole in the kernel then lay several eggs just inside the shell of the nut (Figure 4E-F; Figure 5)
These eggs hatch in one to two weeks and the white or cream-colored larvae (Figure 2) feed on the kernel for approximately five weeks (Figure 4G)
Mature larvae chew circular exit holes through the shell of the nut (Figure 4H) then drop to the ground and burrow into soil
larvae will still chew an exit hole and emerge from the nuts
they construct smooth-walled pupal chambers (Figure 4I) where they will remain for several months
Most larvae will pupate the following fall (Figure 4K) then emerge from the ground as adults
coinciding with bur and kernel development
remain underground through a second winter
These insects will pupate and emerge from the soil as adults the following year in late spring or early summer
typically congregating on blooming catkins (Figure 4J)
This two-phased underground diapause (dormant period) results in a biennial cycle of weevil density in orchards
with high and low populations occurring in alternate years
weevil populations are consistently higher in odd years compared to even years.
Homemade and commercial traps to monitor emergence or activity of adult chestnut weevils (Figure 6) are available
There are no commercially available lures to attract weevils to the traps
and none of the traps are highly effective at capturing adults.
A rough estimate of current weevil densities can be attained using a simple limb tapping technique
tarp or drop cloth beneath the canopy so that the edge of the cloth is just outside the longest branches
Shake or strike branches over the drop cloth with a long pole or stick
they drop from the canopy and play possum (feigning death) for a few moments
These weevils can be easily captured and counted
Weevils tend to congregate and may not be uniformly distributed within an orchard
Sampling two to four aspects of at least 5 to 10 trees per acre should provide a good indication of the current weevil population in the orchard.
High or even moderate densities of chestnut weevils can become a serious problem within commercial orchards
Unmanaged weevil populations can infest more than 60% of harvested chestnuts and a few growers have reported losing 90% of their harvest due to weevil feeding
Larval feeding along with the frass excreted by larvae inside chestnut kernels renders the nuts foul and unmarketable (Figure 1)
It can be even more problematic if larvae emerge after consumers have purchased fresh chestnuts (Figure 7)
Weevil larvae crawling across a marketplace shelf or a countertop can ruin the appeal of fresh chestnuts for consumption or future purchases.
Adult weevils are most abundant and active in fall after burs mature and kernels have completed development
they can be found in orchards throughout the growing season
4% of weevils were captured before catkin bloom (mid-May – late June; approx
8% were captured during catkin bloom (late June – mid-July; approx
15% were captured as burs developed after catkin bloom was completed (mid-July – late September; approx
while 73% were captured after kernel development was completed in fall (late September; approx
Timing cover sprays of insecticides is an essential aspect of controlling adult weevils
Most insecticide labels encourage applicators to avoid insecticide applications when trees are blooming (late June – mid-July; approx
800 – 1,300 DD50F) to minimize potential harm to pollinators
Although chestnut trees are wind pollinated
chestnut catkins attract an array of pollinators
Insecticide sprays to control chestnut weevil adults can be applied in early to mid-September (approx
most adult weevils have emerged from the soil to mate and lay eggs in mature burs and kernels
Always read pesticide labels and be mindful of pre-harvest intervals before making an application.
It is important to treat harvested chestnuts to stop development of weevil larvae inside the kernel as quickly as possible
Two options for post-harvest control can significantly reduce numbers of weevil larvae developing and emerging from harvested chestnuts: water curing and hot water submersion. Water curing is a simple treatment that was traditionally used to kill weevils and other pests in harvested chestnuts
This process involves submerging chestnuts in room temperature water and allowing a partial lactic fermentation process to occur over the course of 7 to 9 days
chestnuts can be dried for several hours then refrigerated until sold
This treatment requires no expensive equipment and can be a practical tactic for hobbyists and small producers
using standard 30-gallon ice chests (Figure 8).
and more efficient option for controlling weevil larvae in harvested chestnuts
Chestnuts must be submerged in water heated to 120 F (49 C) for 15 to 20 minutes then allowed to dry at room temperature
Large commercial operations often use a commercial vegetable blancher or similar piece of equipment to treat pounds of chestnuts at one time
Hobbyists can use a sous vide (Figure 9) or an outdoor burner to treat smaller batches of chestnuts.
It is essential that nuts reach an internal temperature of 119.6 F (48.7 C)
This ensures that more than 99% of larvae will be killed
Size of nuts affects how rapidly internal temperatures increase during submergence
should be submerged for 15 to 20 minutes while smaller chestnuts need to be submerged for 10 to 15 minutes
Use a thermometer and probe to periodically check water temperatures and internal temperatures of nuts from each batch to ensure consistency.
Managing chestnut weevils in commercial orchards is increasingly a challenge for Michigan growers and processors
There is minimal allowance for pest presence in the market due to the grub-like appearance of the larvae and high degree of damage caused by larval feeding
Growers can use properly timed insecticide sprays to reduce adult densities and egg laying
while processors can use post-harvest treatments to kill weevil eggs and young larvae before they cause noticeable damage to nuts
Combined efforts on both fronts can minimize chestnut weevil problems and help Michigan’s thriving chestnut industry continue to expand.
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When autumn arrives in Catalonia (in northeastern Spain), the air is filled with the aroma of roasting chestnuts, marking the beginning of La Castanyada – Catalan for “the chestnut festival.” Held on the eve of All Saints Day on November 1
yet somehow in the air since early October
offering a heartfelt way to honor the memory of loved ones
Deeply rooted in local culture and Catholic devotion
La Castanyada remains a meaningful tradition that bridges past and present generations
Although the festival originated as a harvest celebration
it is now closely associated with the Catholic feast of All Saints Day
families visit cemeteries to clean and decorate graves with flowers
normally before attending Mass to pray for the souls of the departed
La Castanyada also brings the community together for a comforting meal of seasonal foods such as roasted chestnuts
in Catalan) are the centerpiece of this feast
roasted over open fires and shared with family and friends
welcoming atmosphere with the smoky aroma of roasted chestnuts
earthy treats bring comfort and nourishment as the cooler days of fall set in
A key part of the celebration are panellets
small almond-based cakes that come in a variety of flavors and decorations
Traditionally made with marzipan and pine nuts
panellets are rolled into bite-sized balls and baked until golden
Other variations include toppings such as coconut
These sweets originated in monasteries and were once used as “blessed food” to share after some religious celebrations
They are now closely associated with this time of year
and remind participants of the simple joys and spiritual nourishment that come from gathering together
La Castanyada is now a joyful feast of remembrance
Although it shares the same season with Halloween
focusing less on costumes and festivities and more on gratitude
offer unique ways to mark the season and remember the connection between the living and the dead
the customs of La Castanyada coexist comfortably with modern influences
making room for both thoughtful memory and fun
this festival offers a unique opportunity to pass on the meaning of All Saints and All Souls to younger generations in a festive yet meaningful way
Children not only enjoy the chestnuts and sweets
but also learn about the importance of honoring their ancestors and remembering the saints who have gone before them
as well as praying for the souls in purgatory
As families gather to roast chestnuts and share sweet panellets
they are reminded of the bonds that unite them across time and the hope that in the Communion of Saints we are never truly separated from those we love
Articles like these are sponsored free for every Catholic through the support of generous readers just like you
Please make a tax-deductible donation today
Help us continue to bring the Gospel to people everywhere through uplifting Catholic news
A Wheel of Fortune contestant had a holiday season they’ll never forget after appearing on the iconic game show on Tuesday (December 17) and making a hilariously wrong guess on a festive-themed puzzle
The contestant in question was Phil McManus from Palmer
who faced off against Matt Komma from Riverton
Things got off to a rough start for McManus in Round 1’s “Same Letter” category
where he attempted to solve a three-word puzzle
Despite having control of the wheel and filling in all but two of the letters
McManus struggled to come up with the correct answer
the puzzle board read: “C H O C O L A T E S / C H E S T N U T S / & / C H I _ N E _ S.”
an “I,” McManus decided to solve
This allowed Komma to swoop in with the correct answer
McManus’ wrong response cost him $9,550
putting him on the back foot for the rest of the episode
found McManus’ response hilarious and took to social media to share their reactions
“That was my shopping list last weekend.”
“Christmas theme episode of Wheel of Fortune
Love Wheel of Fortune but where do these contestants come from #chickens,” wrote another
Chocolates, Chestnuts and…. #WheelOfFortune pic.twitter.com/1gVC8h952F
— AC (@ACinPhilly) December 18, 2024
“When I think of chocolates and chestnuts
the next word I think of is chickens,” said another
“He really screwed up lol right after he screwed up by saying chocolates chestnuts and chickens
I bet that goes viral,” added another
“Treat yourself a round of sausage! And chickens!” wrote one fan, referring to a memorable wrong answer from an episode in November where a contestant guessed
“Treat yourself a round of sausage.”
“Did that man look at that puzzle and say Chocolate
“Phil got me crying right now,” said one commenter
and… chickens like that don’t even make sense,” another added
While he might not have won Wheel, McManus did get to tick another thing off his bucket list. During the show, the Massachusetts native told host Ryan Seacrest that he was diagnosed with cancer two years ago and basically “handed a death sentence.” Afterward
and I actually went last night for the first time,” he said before revealing
“I’m actually in remission now.”
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This holiday season it's probably not American chestnuts roasting on an open fire because the species is nearly extinct
Researchers at SUNY-ESF are working to develop blight-tolerant American Chestnut trees
American Chestnut Trees were threatened by disease more than 100 years ago
This chestnut blight is caused by an invasive fungus that enters the bark of the tree
a couple of different acids and enzymes that can kill the tree tissue,” Andrew Newhouse
the director of the American Chestnut Research and Restoration Project at SUNY-ESF
the living tissue under the bark of the American chestnut."
Newhouse says more than 99% of American Chestnut Trees that would produce big nut crops are gone — so people have turned to other sources
and there are some of those food varieties of chestnuts that are very good to eat and can be grown here as well," Newhouse said
"But those aren't the same as the trees that we would want to restore to a forest and would have the same ecological interactions as full American chestnuts did.”
But Newhouse said they’re working to revitalize the American chestnut
by adding a new gene to the tree to allow them to survive in the face of blight
"It's not preventing the trees from being infected by blight
but rather it's allowing them to survive with less damage.”
Blight is so widespread in our forests so hope of eradication or planting trees in new locations where it's not found isn’t an option
Newhouse said the results of the genetically modified trees have been promising so far
And he acknowledges there won’t be a single solution to restoring chestnuts
but is hopeful the work being done is an important step in the broader realm of restoration
Federal approval for public distribution of the SUNY-ESF tree was delayed after scientists noticed a labeling mixup between the Darling 58 and Darling 54
though Newhouse says the two are nearly identical with the difference being where the blight-resistant gene is inserted into the tree’s genome
OLEAN — On the south side of Mount Hermann
Jim Brady walked along the logging trails of his personal Hundred Acre Wood
As he guided more than 60 visitors Saturday
Your support helps make our show possible and unlocks access to our sponsor-free feed
With an episode from our holiday archives all about chestnut trees
Stick around until the end of the episode for an update on the latest science
too.MADDIE SOFIA: You're listening to Short Wave
Maddie Sofia here with Short Wave reporter Emily Kwong.KWONG: Hey
You've been delving into the mystery of what happened to one of the most significant trees in the United States
we'd buy them roasted on the streets of New York
you honestly can't go anywhere this time of year without hearing Nat King Cole sing about them
You know what I'm talking about.SOFIA: I do.SOFIA: [NAT KING COLE
"THE CHRISTMAS SONG (CHESTNUTS ROASTING ON AN OPEN FIRE)"] Chestnuts roasting on an open fireKWONG: It just sets the mood.SOFIA: Right?KWONG: You know what time it is
why haven't I ever seen a chestnut tree in the United States
most of the 4 billion chestnut trees on the Eastern seaboard had died
are all imported from Europe and Asia.SOFIA: Huh.KWONG: And if you ask people from Appalachia
where the chestnut was an important species for the ecosystem and the economy
this tree represented a way of life that was lost
Rex Mann of Kentucky says his father never got over it.[AUDIO PLAYBACK]REX MANN: He never became reconciled to that loss
He was-- he was always hopeful that something would happen
that the tree would come back.[END PLAYBACK]KWONG: Now
Rex is one of the many people bring a version of the American chestnut tree back and tapping into the very genetics of the tree to do it.SOFIA: Today on the show
the death--KWONG: And potential rebirth--SOFIA: --of the American chestnut tree
How science is trying to give this functionally extinct tree a fresh start.KWONG: And how that has created some controversy.SOFIA: OK
The mysterious disappearance of the American chestnut tree
He's retired from the US Forest Service and really knows the trees of Southern Appalachia
he gave a TEDx Talk that opened with this memory of sitting around the fire as his father
told chestnut stories.[AUDIO PLAYBACK]MANN: He's talking with great passion about what the tree meant to his people
And the never failing crops of chestnuts that nurtured the mountain people.[END PLAYBACK]KWONG: It's a beloved tree
an estimated 20% of the Appalachian forest
Farmers could lean on chestnuts as feed for their hogs
And the nuts were so valuable that residents in the Smokey Mountains gathered bushels for trading purposes.[AUDIO PLAYBACK]MANN: Take them to the local country store
And they would swap them for things that they had no money to buy
like shoes for the kids.[END PLAYBACK]KWONG: But Rex
a mysterious and deadly fungus was discovered on trees in New York City
They likely came from a nursery stock of Japanese chestnut trees
And this blight began to spread down the coast
most of the four billion chestnut trees were dead or infected with blight fungus.SOFIA: OK
so what does this fungus look like?KWONG: OK
it's a parasitic fungus with a bright yellow orange color
It can grow underneath the bark looking like these orange gashes
creating these actively fruiting pustules.SOFIA: Pustules are never good.KWONG: Yeah
it cuts off nutrients and water to the rest of the tree
And for America's forests to change so dramatically just when the Great Depression hit and people really relied on these chestnuts
Rex remembers as a kid walking through the aftermath.[AUDIO PLAYBACK]MANN: What I saw when I was growing up was what I would call the gray ghost
they were still standing in the forest.[END PLAYBACK]KWONG: Important footnote-- the blight doesn't actually kill the root system of these trees
American chestnut trees-- Jared estimates there are about 400 million now-- are basically shrubs sprouting from the roots
And they get infected by the blight and are killed back before reaching sexual maturity
It's like the whole species has been condemned to eternal infancy.SOFIA: The poor little trees never get to grow up.KWONG: Exactly
on other trees that don't get sick from it
the American chestnut tree was declared functionally extinct.SOFIA: Right
And Rex remembers a researcher lecturing to his forestry class basically saying they're gone.[AUDIO PLAYBACK]MANN: I remember him saying
And they had just given up all hope.[END PLAYBACK]KWONG: But Maddie
there might be hope.SOFIA: Chestnut tree hope.KWONG: Something like it
a group formed the American Chestnut Foundation
Rex Mann has been a long time of the Kentucky chapter
has the foundation's strategies for bringing back a version of the American chestnut tree that can fend off the fungus.SOFIA: So it can grow and essentially reproduce on its own in nature.KWONG: Yes
this man named Bill Owens recorded a song to help them raise money.[AUDIO PLAYBACK]BILL OWENS: Like manna from heaven.[END PLAYBACK]SOFIA: Oh
he did.[AUDIO PLAYBACK]OWENS: To feed the people and the animals.[END PLAYBACK]KWONG: Sung alongside his very famous niece
chestnut treeSOFIA: Dolly!KWONG: The one and only.SOFIA: Is this real?KWONG: That's Dolly Parton
And she released this song a few years ago for this whole effort
thank God for second chances." And it's science that's giving this tree a second chance.[AUDIO PLAYBACK]JARED WESTBROOK: My name is Jared Westbrook
I work for the American Chestnut Foundation.[END PLAYBACK]KWONG: Jared is the director of science there
overseeing this three-pronged initiative to restore the tree.SOFIA: Tree-pronged approach
scientists have been experimenting with crossbreeding the American chestnut with the Chinese chestnut tree
which does not get sick from the blight.SOFIA: OK
they've taken these offspring and performed a special kind of crossbreeding called backcrossing that reinforces the traits of the American chestnut tree
There's three generations of these hybrids at the foundation's research farm in Virginia.[AUDIO PLAYBACK]WESTBROOK: So we've planted hundreds of thousands of trees at this farm
And now we're selecting the 1% most resistant trees.[END PLAYBACK]KWONG: It's still slow going and maybe not the best strategy
because Jared's realized that blight resistance is not a simply inherited trait after all.[AUDIO PLAYBACK]WESTBROOK: So there's a lot more genes involved
And as you do more crossing to American chestnut
you get trees that are less blight tolerant.[END PLAYBACK]KWONG: So traditional breeding has its limits
The more you make these trees American chestnut-y
attacking the blight itself by infecting it with a virus.SOFIA: That's probably fine
I'm not worried about that at all.KWONG: But it's kind of-- it makes sense
this strategy has been effective in Europe
But the problem in the US is you'd have to go around and individually infect each spot of fungus on the tree
and that is just--SOFIA: Not realistic.KWONG: So much work.[AUDIO PLAYBACK]WESTBROOK: But we can't go out to the forest and treat 400 million trees with this virus every year
So it's too labor intensive for large-scale restoration
but it works for our breeding efforts.[END PLAYBACK]SOFIA: So what about prong number three
but also the most controversial for some folks
So think about corn or cotton.SOFIA: Got it.KWONG: OK
we've added new genes to those agricultural crops to protect them from insects or allow them to tolerate certain weed killers.SOFIA: Yeah
And members of the New York chapter wondered
could we do something like that for the American chestnut tree
Researchers at the State University of New York
their College of Environmental Science and Forestry
They chose a gene naturally found in wheat and a lot of other grass plants and inserted it into American chestnut trees
They planted that first transgenic tree outside the lab in 2006
And their hope is that such a tree will be planted in the wild someday.SOFIA: And how does this gene affect the American chestnut tree?KWONG: OK
so this gene is responsible for creating an enzyme which has the ability to combat oxalic acid
And oxalic acid is what's ultimately attacking trees that have been infected with the blight fungus
So this gene is essentially protecting the tree from being totally consumed by the fungus.SOFIA: Right
so these trees have been genetically modified at this point.KWONG: That's right
Researchers at SUNY call these samples Darling American chestnut trees
And before they can be planted in the wild
they have to pass federal regulatory approval
they all have to sign off.SOFIA: And what are these regulatory agencies looking for?KWONG: Basically
they'll want to know how these transgenic chestnuts are impacting the environment around them
They'll want to know about tree growth rates and pollen flow
A lot of testing to be done on trees that are still pretty young
And that's made some people very nervous.SOFIA: Right
Some people are worried about genetically engineered trees and other things being released into the wild.KWONG: Yes
two members of the foundation's Massachusetts Rhode Island chapter stepped down over this
A group of activists released a white paper saying this would be a
"massive and irreversible experiment." They're fearful this could change the ecosystem in ways we just can't predict
And Jared gets where these critics are coming from.[AUDIO PLAYBACK]WESTBROOK: It messes with people's idea of what is natural or what is nature
And we're doing an interventionist approach to a problem that humans caused in terms of bringing in introduced pathogens that the native species are naive to and they're susceptible to.[END PLAYBACK]KWONG: Basically
it could open the door for genetically engineering other trees
And there's public opposition to that idea.SOFIA: Big questions out there
is the poster child for raising those questions
What lengths are we willing to go to to bring back trees
Jared argues that because the American chestnut tree was such a keystone species in its heyday
that this tree is worth all the trouble.[AUDIO PLAYBACK]WESTBROOK: It would be very difficult to try to resurrect all of the species that have gone extinct as a result of human intervention
But if we were selective about choosing keystone species that have a large ecological effect
I think that is where the intervention is justified.[END PLAYBACK]KWONG: And the public can weigh in on these decisions regarding these transgenic chestnut trees when they're up for federal review next year.SOFIA: All right
Thank you for sharing with us the scientific saga of the American chestnut tree.KWONG: Such a saga.SOFIA: Yeah.KWONG: You're welcome
Maddie.[MUSIC PLAYING]KWONG: Since this episode first published five years ago
the American Chestnut Foundation withdrew its SUNY's Darling transgenic chestnut project
I got in touch with Jared Westbrook again to explain why
And he said the foundation found issues with the transgenic trees in the long term
including diminished blight resistance and slow growth
who directs the chestnut restoration project there
told me over email that the college has made improvements to their program since these concerns came to light
and he defended the viability of Darling trees against blight in the long term
"No single tool or approach will fully solve the problem of chestnut blight
but we believe that biotechnological approaches
can be a safe and effective part of the solution." As for the American Chestnut Foundation
too-- that their main strategy at the moment is version of prong one
where the foundation uses genomics to select the very best hybrid trees
and ultimately create a line of progeny with blight resistance woven into their DNA at birth
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For more Fields of Mistria game help, check out:
CASTANEA — Chilly temperatures couldn’t stop hundreds of area residents from braving the cold for the Inaugural Pennsylvania Chestnut Festival.
The festival, held at the Castanea Fire Company Picnic Grounds near the Lock Haven City Airport on Saturday afternoon, drew in hundreds of individuals — and that was just in the first hour.
The festival was spearheaded by the Castanea Township Recreation Committee, which wanted to highlight the connection of the township to the chestnut.
It featured live music, chestnut-based foods and beverages, vendors, exhibitors, portable ice rink and s’mores over outdoor burn barrels provided by Cub Scouts from Troop 711 in Lock Haven.
Committee member Diana Andrus’s husband, Mike, even designed and created two large cutouts of the festival’s mascot — Chas — which offered the opportunity for a photo shoot.
Keeping with the chestnut theme, the recreation committee had 500 roasted chestnuts to hand out to individuals at the start of the festivities. According to Committee Member Brady Carnahan, they ran out of chestnuts within the first hour of the festival.
“We were so packed for that first hour,” Committee Chair Rick Schulz said.
Schulz said he and the committee were thrilled with the reception of the inaugural event.
“We’re overjoyed. We were hesitant about having a winter event because of weather concerns and whether the public would respond,” Schulz said. “We’re quite happy with the turnout. We increasingly are seeing people at the booths from outside of the county, too. Which, of course, makes us even happier.”
Schulz said about 20 vendors turned out to set up shop inside the Castanea Picnic Grounds facility to sell their products.
“We’re hoping to grow more and more each year and focus on the chestnut tree and so forth,” he said.
Schulz thanked the support of the Clinton County Commissioners, Clinton County Tourism and the township’s supervisors for their support in making the event possible.
He also gave a shout out to the 40 volunteers that helped ensure the event ran smoothly.
“I do sincerely appreciate the efforts of the committee and many of our volunteers that have supported us in making this event successful,” he said.
Saturday’s event saw musical performances by John Stevens Doubleshot Polka Band along with area favorite Private Stock Trio. Individuals were able to enjoy the live music while perusing various vendors and enjoy a drink from Bald Birds Brewing or Oregon Hill Winery.
HARRISBURG, Pa. (AP) — A consultant paid to review security at the official residence of Pennsylvania Gov. Josh ...
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by Julia Lee
but unlike the other plants you find around the colorful world
Juniper will task you to find water chestnuts
she’ll teach you how to cook water chestnut fritters
we explain where to find water chestnuts in Fields of Mistria
You can find water chestnuts in set spawn locations in The Narrows
There’s quite a few growing in the water directly south of the museum
They appear as small sprouts along the edge of the river
there were five spots along the river where the water chestnuts spawn and respawn
Water chestnuts take about four in-game days to respawn
so we recommend holding on to a few of them before selling off or using the rest
just in case you need them during this respawn period
You can also buy them sometimes from Balor’s merchant wagon for 25 Tesserae each
though his shop seems to rotate on a random basis
so this method of grabbing chestnuts isn’t really reliable
Outside of the initial quest where they’re requested
you can eat the water chestnuts for three HP and stamina each
you can use water chestnuts to make better animal feed for your ranching needs
You can cook the chestnuts into water chestnut fritters
Notably, Juniper, one of the romance candidates, likes receiving water chestnut fritters as a gift, so they may be worth cooking with her in mind.
The best of Polygon in your inbox, every Friday.
Festival of the Holidays has officially kicked off in EPCOT, and we have been BUSY showing you everything there is to experience at the most holly jolly EPCOT festival of the year
The one thing that really intrigued me was the Roasted Chestnuts, which are truly roasted over an open fire! A bag costs $6.25, and I was really looking forward to trying this classic holiday option.
While the team and I enjoyed the salty, roasted flavor of the chestnuts, the thing with chestnuts is that you’re not supposed to eat the outside of them, only the inside. And when I tell you these were nearly impossible to break open, that’s not an exaggeration.
AllEars Myranda and I visited this booth together, and she wasn’t a fan of them at all. I think you’ll enjoy them if you’re a fan of chestnuts, but I discovered here that chestnuts aren’t my favorite (I much preferred the Cinnamon-glazed Pecans and Cinnamon-glazed Cashews for $6 each here, and there are Cinnamon-glazed Almonds available too).
Not wanting to be wasteful, though, I stuck them in my bag to carry around with me for the ENTIRE rest of the day as I covered other parts of the festival, thinking I would reach for them throughout the day as a little snack. Well, that never happened, so instead, I just walked around the whole day with a bag of chestnuts IN my bag, and yes, it did make my bag smell just like Christmas.
At the end of my day, I did break one open again, and surprisingly, I think the flavor and texture improved after sitting all day! Unfortunately, the chestnuts were even HARDER to break it open, so that was pretty ironic. Let’s just say that these are an acquired taste…and I really tried my best to like them.
It also left my hands pretty covered in chestnut residue, so you’ll likely want to wash your hands pretty frequently if you’re snacking on these throughout the day. Overall? Chestnuts? Pretty weird. I don’t see the appeal — sorry, squirrels!
Looking for our review of the festival as a whole? Check out our new video below!
Be sure to stay tuned to AllEars for all the latest Disney World news and reviews!
What booth are you most looking forward to at this year’s Festival of the Holidays? Tell me in the comments!
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Volume 8 - 2025 | https://doi.org/10.3389/ffgc.2025.1561027
Introduction: The European chestnut (Castanea sativa Mill.) is a historically and ecologically important tree in the Iberian Peninsula
The species now faces challenges related to the abandonment of traditional management practices
although the potential impact of the later on chestnut potential range remains unexplored
Methods: We assessed variations in chestnut potential range under different climate change scenarios in the Iberian Peninsula
by studying the current and projected habitat suitability of the species across distinct biogeographical regions (Atlantic and Mediterranean) and Regions of Provenance (RoPs)
Environmental static (topography and soil parameters) and dynamic (bioclimatic variables) factors were used to build Species Distribution Models (SDMs)
Future habitat suitability projections were based on an ensemble of five global circulation models (GCMs) for two climate change scenarios included in CMIP6
The SDMs were constructed using the Random Forest algorithm
Results and Discussion: Our model achieved an accuracy of 86.82%
with high sensitivity (89.91%) and specificity (83.73%)
Favourable chestnut habitats were linked to wetter regions
and included factors associated with annual and seasonal precipitations
Optimal conditions for chestnut trees include precipitation exceeding 800 mm/year and mean temperature ranging from 10-15°C
Future projections suggest a potential habitat loss for chestnut and slight changes in net primary productivity
The Regions of Provenance exhibit varying levels of resilience
with the Mediterranean regions being particularly vulnerable
We highlight the need to develop mitigation strategies to facilitate chestnut resilience in the face of threats related to climate change
Better understanding of the potential impacts of climate change on habitat suitability for chestnuts will help to identify the most appropriate actions across space
considering future potential climate scenarios
we assessed the potential impacts of climate change on chestnut potential range across the Iberian Peninsula
considering both current and projected habitat suitability
We also conducted a comprehensive analysis of the potential impacts of climate change across established chestnut ecological regions (areas where species thrive under uniform conditions)
To address the climatic heterogeneity of the area and facilitate specific comparisons and analyses
two types of territorial divisions were used: the biogeographical the Atlantic and Mediterranean regions (where chestnut are present); and the Regions of Provenance (RoPs)
regarded as ecologically homogeneous areas for the species
Figure 1. (A) Map of the Biogeographical Regions in Europe from 2016 onwards (source: European Environment Agency) and (B) Regions of Provenance (RoP) with presence of sweet chestnut. Source: (Instituto da Conservação da Natureza e Florestas (ICNF), 2018; Alía Miranda et al., 2009)
which divides the territory into ecologically analogous zones independent of species
we restricted our analysis to occurrences separated from each other by >200 m
while a minimum distance of 1,000 m was selected for absences to match NFI sampling intensity
we used 4,505 occurrences and 56,498 absences for subsequent analyses
3,128 georeferenced occurrences were located in the Atlantic biogeographical region
1,359 in the Mediterranean and 18 in the Alpine region
has been excluded from the biogeographical regions analysis
to remove multicollinearity we excluded those variables with a Spearman’s pairwise correlation coefficient > |0.7| or a Variance Inflation Factor (VIF) > 5
to exclusively assess the importance of predictors in the Atlantic and Mediterranean biogeographical regions
all predictors were considered for modelling without exclusions
empirically derived model that includes valuable information for management considerations
Both environmental variables as climate change variables were cropped to fit the study area, reprojected to GRS84 (EPSG: 4326) and resampled to a 100 m resolution by bilinear interpolation. These processes were conducted using the terra package (Hijmans et al., 2022) in R 4.3.1 software
the presence/absence data were split into two data sets
with 80% allocated for training and 20% for validation purposes
The RF model was trained on a balanced sample achieved through down-sampling
with an mtry value computed as the square root of the number of predictors and including 1,000 trees
The predictive performance of RF models was assessed with the validation data set through sensitivity and specificity (i.e.
the numbers of correctly classified presences and absences
Spatial predictions were returned in terms of the probability of the target pixel and then converted into binary outcomes using a conservative threshold of 0.4 at a spatial resolution of 100 m
climate change scenario and time interval was generated
an ensemble of models was generated using both mean and median values for each scenario and time interval and binarized using the above-mentioned threshold
Binary maps were used to assess significant differences in elevation and productivity (NPP) in future scenarios by applying the Wilcoxon-Mann–Whitney test (at α = 0.01) and using the mean of the current scenario as the reference for comparison
Net Primary Production (NPP), commonly used to evaluate the responses of the terrestrial carbon cycle to climate change, depends on climatic variables (Lieth, 1975). Previous studies by Pérez-Girón et al. (2020) show a negative correlation between NPP and mean temperature variables (MAT
MATmin and MATmax) and a positive correlation between NPP and latitude
while no correlation was found with mean annual precipitation (MAP)
To assess changes in the spatial distribution of environmentally suitable habitats for chestnut under current and future climatic conditions, scenarios and temporal intervals, we used the biomod2 package (Thuiller et al., 2023) to compute the species stability
the latter of which was calculated as the difference between gains and losses
In order to map the changes on the chestnut distribution
we categorised the species change as stable (change equal to zero)
slight (values from (−)1 to (−)24)
moderate (values ranging from (−)25 to (−)49) and extreme (values equal to or greater than (−)50)
The key precipitation and temperature variables were chosen to compute significant habitat associations by comparing the occurrences of sweet chestnut within a habitat against a randomly distributed set of points. The comparison was implemented with the shar package (Hesselbarth, 2021) and a significance level of 0.01 was applied
These bioclimatic factors are essential for understanding the dynamic nature of chestnut habitats across the Iberian Peninsula
influencing critical ecological aspects such as vegetation composition
Temperature breaks were established every 2.5°C
and 300 mm steps were chosen for precipitation
The resulting positive species-habitat associations were used as a reference framework for future predictions within RoPs
Within the framework of the source regions
changes in habitat suitability for chestnut were analysed on the basis of future projections
These analyses quantified the percentage differentials between gains and losses for RoPs with a minimum land area of 100 hectares for representation
encompassing a total of 33 distinct regions of origin across the Iberian Peninsula
of which 28 regions are in Spain and 5 in Portugal
Other important factors such as SOC provides valuable information about soil fertility levels
Current spatial predictions of habitat suitability for sweet chestnut
expressed as probability (A) and importance of variables (B)
When examining the overall importance of the different variables used concerning the Atlantic and Mediterranean biogeographical regions, notable differences emerged (Figure 3); highlighting the importance of precipitation as one of the most influential variables in habitat suitability and chestnut resilience
precipitation seasonality (Bio15) was the most important variable
which impacts on soil moisture availability
Other important factors were the mean temperature of coldest quarter (Bio11)
indicating winter severity and affecting chestnut physiology and survival
the annual mean temperature (Bio1) (influencing temperature stability and growth conditions)
annual (Bio12) and wettest quarter (Bio16) precipitation
critical for soil moisture during growth periods
were the most important variables affecting chestnut habitat suitability
the precipitation of wettest month (Bio13)
Overall importance of variables in (A) Atlantic and (B) Mediterranean Biogeographical Regions
The importance of variables in the Atlantic and Mediterranean biogeographical regions was assessed exclusively through a RF model that included all predictors without exclusions
different from the RF used to predict distributions
particularly towards the end of the century
while habitat gain is evident in all scenarios and time periods
it is outweighed by the magnitude of habitat loss
resulting in overall negative range changes
Chestnut habitat suitability for (A) 2011-2040
and (E) 2071-2100 under the SSP3-7.0 scenario
and (F) 2071-2100 under the SSP5-8.5 scenario
as determined using a median ensemble approach
suggesting the involvement of some elevational-related stress tolerance in its adaptation
the median NPP is predicted to undergo a slight but statistically significant increase
particularly between 2041 and 2070 onwards
as might be expected due to the increase in temperatures
as it is more pronounced at relatively low NPP values
Distribution and mean comparison in current and future predicted areas of (A) elevation and (B) NPP
Statistical significance: ns: p > 0.05; *p ≤ 0.05; **p ≤ 0.01; ***p ≤ 0.001; ****p ≤ 0.0001
Chestnut habitat change in the RoPs for (A) 2011-2040
Considering this temperature range as optimal for chestnut
The challenge for chestnut in these RoPs escalates further in the analysed climate change scenarios
intensifying throughout the periods 2011–2040
the influence of annual precipitation (Bio12) is less constraining for the species than the annual mean temperature (Bio1)
annual precipitation is anticipated to fall below acceptable thresholds for the species
Density function of mean annual precipitation (Bio12) under current environmental conditions and projected future climate change scenarios across RoPs
The red line indicates the threshold above which the presence of the species shows a positive association with mean annual precipitation
Density function of annual mean temperature (Bio1) under current environmental conditions and projected future climate change scenarios across RoPs
The blue and red lines indicate the thresholds between which there is a positive association between species presence and annual mean temperature
accentuated by climate scenarios in the latter periods of the century; where Mediterranean climatic conditions are expected to extend northwards into the Iberian Peninsula
Our findings contribute to establish an ecological reference framework based on current data for the species and its region of origin in the Iberian Peninsula and provide valuable insights to guide conservation actions in the face of changing climate. These observations are also consistent with previous findings of Pérez-Girón et al. (2020)
who evaluated the resilience of sweet chestnut Agroforestry Systems (AFS) under both the RCP2.6 and RCP8.5 scenarios through 2,100
These authors emphasised the need for strategic planning and management of chestnut habitats suited to the diverse RoPs to counteract the detrimental effects of climate change
The comprehensive examination of chestnut RoPs sheds light on the intricate effects of climate change on species distributions
emphasising the urgent need for coordinated regional and international efforts to address these challenges and protect chestnut biodiversity
The results of this study confirm the preference of chestnut for wetter
oceanic climates and highlight the critical role of precipitation in determining habitat suitability and resilience
Precipitation levels exceeding 800 mm/year and optimal mean temperatures ranging from 10 to 15°C are key determinants of chestnut habitat suitability
The European chestnut displays a high level of adaptability to varying elevation conditions and adaptive potential in response to productivity-related obstacles
Its stress tolerance and capacity for recovery may be key for its survival in dynamic climate scenarios
Future projections highlight significant potential habitat loss
alterations in elevation and shifts in NPP
with the Mediterranean region facing heightened vulnerability
Escalating temperatures could surpass chestnut tolerance thresholds and lead to alterations in the range of the species
Variations in resilience and vulnerability across different RoPs emphasise the need for strategic habitat management to conserve chestnut diversity amidst climate uncertainties
this study aims to serve as a spatial reference point for future conservation and management strategies for the species
laying the groundwork for forthcoming research on chestnut-related socioecological systems
Publicly available datasets were analysed in this study. This data can be found here: https://zenodo.org/records/14065833
The author(s) declare financial support was received for the research
This study was conducted within the framework of the LIFE19 NAT/ES/000913 “Bears with Future” project
and coordinated by the Brown Bear Foundation
This research received additional financial support from the Spanish Ministry for the Ecological Transition and the Demographic challenge of the Government of Spain
We sincerely thank the Instituto da Conservação da Natureza e das Florestas (ICNF) in Portugal for their generous provision and authorization to use the data from the 6th National Forest Inventory (IFN) for our research project
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest
The author(s) declared that they were an editorial board member of Frontiers
This had no impact on the peer review process and the final decision
The authors declare that no Generative AI was used in the creation of this manuscript
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations
Any product that may be evaluated in this article
or claim that may be made by its manufacturer
is not guaranteed or endorsed by the publisher
The Supplementary material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/ffgc.2025.1561027/full#supplementary-material
Temperatura del aire y precipitación (1971–2000)
Ministerio de Medio Ambiente y Medio Rural y Marino
Catálogo de Publicaciones de la Administración General del Estado
Google Scholar
Adaptive diversity and drought tolerance in Castanea sativa assessed through EST-SSR genic markers
The dynamics of flower development in Castanea sativa mill
Alía Miranda
Regiones de procedencia de especies forestales en España
Madrid: Organismo Autónomo Parques Nacionales
Google Scholar
Álvarez-Álvarez
Relating growth and nutrition to site factors in young chestnut plantations established on agricultural and forest land in northern Spain
Evaluation of Ecto-mycorrhizae as a determinant of chestnut growth and stress response
Google Scholar
Herbivory in global climate change research: direct effects of rising temperature on insect herbivores
Extreme heat events in the Iberia peninsula from extreme value mixture modeling of ERA5-land air temperature
Crossref Full Text | Google Scholar
“Orchard Management” in The chestnut handbook
International Standard Book Number-13: 978–1–138-33402-1 (Hardback)
Google Scholar
“European chestnut traditional and high-density orchards” in The chestnut handbook
International Standard Book Number-13: 978-1-138-33402-1 (Hardback)
Google Scholar
Role of Arbuscular Mycorrhizal Fungi in plant growth regulation: implications in abiotic stress tolerance
Biodiversity protection against anthropogenic climate change: conservation prioritization of Castanea sativa in the South Caucasus based on genetic and ecological metrics
Böhnisch
Hot spots and climate trends of meteorological droughts in Europe–assessing the percent of Normal index in a single-model initial-condition large ensemble
Checking bioclimatic variables that combine temperature and precipitation data before their use in species distribution models
Crossref Full Text | Google Scholar
Institut pour le développement forestier
Google Scholar
Crossref Full Text | Google Scholar
Crossref Full Text | Google Scholar
Global climate-related predictors at kilometre resolution for the past and future earth system science data
Camisón
Changes in carbohydrates induced by drought and waterlogging in Castanea sativa
Camisón
Exploring the use of scions and rootstocks from xeric areas to improve drought tolerance in Castanea sativa miller
Cardoso Pereira
Extreme precipitation events under climate change in the Iberian Peninsula
Crossref Full Text | Google Scholar
Ecoinfo: assorted tools for the management and analysis of ecological information
Google Scholar
Carneiro-Carvalho
The potential of SiK® fertilization in the resilience of chestnut plants to drought - a biochemical study
Signatures of local adaptation to climate in natural populations of sweet chestnut (Castanea sativa mill.) from southern Europe
Cedano Gıraldo
Assessing climate change impacts on the spatial distribution of Castanea sativa mill
Anadolu Orman Araştırmaları Dergisi 9
How future-proof is sweet chestnut (Castanea sativa) in a global change context
The cultivation of Castanea sativa (mill.) in Europe
from its origin to its diffusion on a continental scale
Different post-culture dynamics in abandoned chestnut orchards and coppices
Google Scholar
“Castanea sativa in Europe: Distribution
usage and threats” in European atlas of Forest tree species
Google Scholar
Producción y manejo de semillas y plantas forestales (Vol
Organismo Autónomo Parques Nacionales
Google Scholar
Changes in seasonal precipitation in the Iberian Peninsula during 1946–2005
Diaz-Varela
“The contribution of chestnut orchard recovery projects for effective area-based conservation: two cases in Asturias (North-West Spain)
En UNU-IAS & IGES” in Satoyama initiative thematic review vol
Sustainable use of biodiversity in socio-ecological production landscapes and seascapes (SEPLS) and its contribution to effective area-based conservation
Tokyo: United Nations University Institute for the Advanced Study of sustainability
Warming scenarios and Phytophthora cinnamomi infection in chestnut (Castanea sativa mill.)
European Commission (2022). Consequences of climate change. Available at: https://ec.europa.eu/clima/climate-change/climate-change-consequences_en (Accessed April 21
Google Scholar
European and American chestnuts: an overview of the main threats and control efforts
Fernández-López
Geographic variability among extreme European wild chestnut populations
Google Scholar
Influence of climate change on chestnut trees: a review
Climate change projections for bioclimatic distribution of Castanea sativa in Portugal
Gandullo Gutiérrez
Las estaciones ecológicas de los castañares españoles
Google Scholar
García-Valdecasas Ojeda
Projected changes in the Iberian Peninsula drought characteristics
GBIF (2024). GBIF occurrence download. Accessed from R via rgbif: https://github.com/ropensci/rgbif
Google Scholar
Gil-Tapetado
Spatial propagation and patterns of abundance of Dryocosmus kuriphilus throughout an invaded region
PubMed Abstract | Crossref Full Text | Google Scholar
Climate change projections for the Mediterranean region
Crossref Full Text | Google Scholar
“Forest management and plant species diversity in chestnut stands of three Mediterranean areas” in Forest diversity and management
Google Scholar
Genetic and demographic recovery of an isolated population of brown bear Ursus arctos L.
Guitián
Effect of management and spatial characteristics on plant species richness of Castanea sativa mill
Hesselbarth
Shar: an R package to analyze species-habitat associations using point pattern analysis
Crossref Full Text | Google Scholar
Hijmans, R.J., Bivand, R., Forner, K., Ooms, J., Pebesma, E., and Sumner, M.D. (2022). Package ‘terra’. Available at: https://cran.r-project.org/web/packages/terra/index.html.@
Google Scholar
The random subspace method for constructing decision forests
Crossref Full Text | Google Scholar
ICNF (2015). 6° Inventário Florestal Nacional. Available at: https://www.icnf.pt/florestas/flestudosdocumentosestatisticasindicadores
Google Scholar
Instituto da Conservação da Natureza e Florestas (ICNF) (2018)
Limites de áreas das Regiões de Proveniência para 24/ou das principais espécies florestais
Google Scholar
IPBES (2019). Global assessment report on biodiversity and ecosystem services of the intergovernmental science-policy platform on biodiversity and ecosystem services (Bonn). Available at: https://ipbes.net/global-assessment-report-biodiversity-ecosystem-services
Google Scholar
IPCC (2021)
Climate Change 2021: the physical science basis: working group I contribution to the sixth assessment report of the intergovernmental panel on climate change : Cambridge University Press
Google Scholar
Climatologies at high resolution for the earth land surface areas
Catalogue of tree microhabitats – Reference field list : Integrate+ Technical Paper
Google Scholar
Modelling the eco-cultural niche of giant chestnut trees: new insights into land use history in southern Switzerland through distribution analysis of a living heritage
Potsdam: Inter-Sectoral Impact Model Intercomparison Project
Google Scholar
Efficient monitoring of phenology in chestnuts
“Modeling the primary productivity of the world” in Primary productivity of the biosphere
Google Scholar
Exploratory Undersampling for class-imbalance learning
Extreme climatic events affect populations of Asian chestnut gall wasps
Crossref Full Text | Google Scholar
Climate change patterns in precipitation over Spain using CORDEX projections for 2021–2050
85 years counteracting an invasion: chestnut ecosystems and landscapes survival against ink disease
Menéndez-Miguélez
Effects of soil nutrients and environmental factors on site productivity in Castanea sativa mill
Menéndez-Miguélez
Development of tools to estimate the contribution of young sweet chestnut plantations to climate-change mitigation
Míguez-Soto
Mediterranean and northern Iberian gene pools of wild Castanea sativa mill
Are two differentiated ecotypes originated under natural divergent selection
MITECO (2022). Cuarto Inventario Forestal Nacional. Available at: https://www.miteco.gob.es/es/biodiversidad/temas/inventarios-nacionales/inventario-forestal-nacional/cuarto_inventario.aspx
Extreme temperature events on the Iberian Peninsula: statistical trajectory analysis and synoptic patterns
Le selve castanili della Svizzera italiana
Memorie della Società ticinese di scienze naturali e del Museo cantonale di storia naturale
Lugano: Società ticinese di scienze naturali; Museo cantonale di storia naturale
Google Scholar
Relating plant and soil water content to encourage smart watering in chestnut trees
Study on yield values of two irrigation systems in adult chestnut trees and comparison with non-irrigated chestnut orchard
Projections of climate change in the Mediterranean Basin by using downscaled global climate model outputs
Pereira-Lorenzo
Chestnut cultivar diversification process in the Iberian Peninsula
Pereira-Lorenzo
Instant domestication process of European chestnut cultivars
Pérez-Girón
Influence of climate variations on primary production indicators and on the resilience of forest ecosystems in a future scenario of climate change: application to sweet chestnut agroforestry systems in the Iberian Peninsula
Pérez-Girón
Linking landscape structure and vegetation productivity with nut consumption by the Cantabrian brown bear during hyperphagia
SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty
and infection dynamic of emerging ink disease of sweet chestnut in southern Switzerland
Status and trends – nature” in Global assessment report of the intergovernmental science policy platform on biodiversity and ecosystem services
Google Scholar
R Core Team (2023)
R: a language and environment for statistical computing
Austria: R Foundation for Statistical Computing
Google Scholar
“‘9260 Bosques de Castanea sativa’” in Bases ecológicas preliminares para la conservación de los tipos de hábitat de interés comunitario en España (Madrid: Ministerio de Medio Ambiente
Google Scholar
Assessment of growing thermal conditions of Main fruit species in Portugal based on hourly records from a Weather Station network
Simler-Williamson
Interacting effects of global change on Forest Pest and pathogen dynamics
doi: 10.1146/annurev-ecolsys-110218-024934
Crossref Full Text | Google Scholar
The future of Iberian droughts: a deeper analysis based on multi-scenario and a multi-model ensemble approach
An introduction to recursive partitioning: rationale
and characteristics of classification and regression trees
Thuiller, W., Georges, D., Gueguen, M., Engler, R., Breiner, F., Lafourcade, B., et al. (2023). biomod2: ensemble platform for species distribution modeling. R package version 4.2-4. Available at: https://CRAN.R-project.org/package=biomod2
Google Scholar
Variability of the Moroccan sweet chestnut (Castanea sativa Mill.): Contribution of the morphological parameters and qualitative descriptors of the nut
“Biological control and management of chestnut diseases” in Integrated management of diseases caused by fungi
Google Scholar
Predictive performance of presence-only species distribution models: a benchmark study with reproducible code
van Westen
Physics-based early warning signal shows that AMOC is on tipping course
Xunta de, Galicia (2022). Continuous Forest Inventory of Galicia. Available at: https://invega.xunta.gal/invega/
Google Scholar
tolerance and adaptation to abiotic stress of olive
grapevine and chestnut in the Mediterranean region: role of abscisic acid
nitric oxide and microRNAs” in Plants and environment; serie abiotic stress
Structural diversity of abandoned chestnut (Castanea sativa mill.) dominated forests: implications for forest management
Citation: Álvarez-Álvarez P
López-Bao JV and Pérez-Girón JC (2025) Impact of climate change over distribution and potential range of chestnut in the Iberian Peninsula
Received: 15 January 2025; Accepted: 27 January 2025; Published: 12 February 2025
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Chestnuts are displayed at a food vendor as a person dressed as Santa Claus offers rides
open-pollinated American chestnut bur grows on a tree at the State University of New York’s College of Environmental Science & Forestry Lafayette Road Experiment Station in Syracuse
and William Powell harvest genetically modified chestnut samples at the State University of New York’s College of Environmental Science & Forestry’s Lafayette Road Experiment Station in Syracuse
Genetically modified chestnuts are labeled
weighed and bagged before being placed into cold storage at the State University of New York’s College of Environmental Science & Forestry in Syracuse
It’s been a very long time since vendors sold the American chestnut on city sidewalks
It’s no longer the variety whose smell some people associate with Christmastime as it wafts from street carts
But memories of the American chestnut’s legacy keep resurfacing for the researchers who want to bring it back
They describe its wood that paneled the homes and schoolrooms of their grandparents
or the photographs of men on the street corners of old Baltimore
and the connection to the importance that this tree played in virtually every aspect of the lives of people,” said Sara Fern Fitzsimmons
chief conservation officer with The American Chestnut Foundation
which is working to restore the tree to flourish as it once did
Once a hallmark of forests from Georgia to New England
American chestnuts now exist mostly as a vast network of root systems underground
but the fungal blight takes hold when the trees start maturing
like those that introduced the blight in the first place
and produce most of the edible chestnuts for fall and winter snacking
American chestnut trees are better suited for timber
they’re culturally loved by people all over North America and they used to be an important species for the ecological health of forests
providing a reliable source of nutritious food and shelter for wildlife and humans alike
“It was really a pretty significant species to lose,” said Amy Brunner
an associate professor at Virginia Tech who works on the tree’s genetics
the less resilient that forest ecosystem is.”
has been trying for decades to breed a hybrid that is mostly American in genetics but with the fungus-fighting traits of the Chinese type
Fitzsimmons said breeders have learned just how difficult that is — blight resistance involves several different genes and it has proven hard to separate them from the traits that distinguish Chinese chestnuts
some scientists have been working on genetically modifying American chestnuts to see if they can boost their immunity that way instead
But progress was delayed by a recent mix-up involving two versions of a genetically modified American chestnut that scientists at State University of New York had hoped could get through the regulatory process as soon as this year
“It kind of stinks that it happened because now it’s taking a little bit longer than we had hoped,” said Linda McGuigan
a research support specialist at the university
But scientists there and elsewhere are continuing to pursue many avenues
referring to the two main methods of breeding and genetic modification
Breeding is vital for achieving enough genetic diversity for trees to adapt to a changing world
but added that she thinks some genetic manipulation will be needed to get to enough blight resistance for American chestnuts to stand a chance
A team at Virginia Tech published a paper this summer to try to answer that question
They looked at 32 climate variables and compared them to projected future climates
then calculated the shortest distance that regionally specific American chestnuts would have to move to offset warming
The idea was to one day help them survive a new climate while keeping them as close as possible to where they once thrived
“I don’t think it’s hyperbolic to say it’s revolutionary” for teams at The American Chestnut Foundation
She said the project will help them better figure out where to collect genes from the immature trees that remain across the country
a forest scientist who taught at the University of Kentucky
is working on a book about trees including the American chestnut
called it “robust and well supported” and “critically important to the success of the chestnut.”
but added that they need to be backed up with real-world experiments
they can probably get pretty fast data off of those field trials
forest scientists know their work might not pay off in their lifetimes
It’s a lesson that became clear for the community when pioneering chestnut restoration experts Bill Powell and Chuck Maynard both died in the past 13 months
McGuigan supported both of their research for years as lab manager at SUNY’s college of environmental science and forestry
“I want to do something good for the future
Follow Melina Walling on X @MelinaWalling and Bluesky @melinawalling.bsky.social