American Chestnut Cooperators'
Foundation
2008 Newsletter
Send your report via our Online Report Form
or to
Forest Service Road 708, Newport, Virginia 24128
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Dear Friends and Cooperating Growers:
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There in no monetary profit in our chestnut
distributions. Each year we aim to break even. After learning
the nursery cost per bundle of seedlings, we make a price to include the
average cost of priority mailing east of the Mississippi. The past
few years, the Foundation has lost money on seedling distributions, and
this year the nursery costs have gone up one dollar per bundle of 25.
Therefore, the 2006 cost per bundle of 25
American chestnut seedlings is $25. Growers west of the Mississippi
need to add $5 per bundle to cover a higher mailing cost.
Please make all checks payable to ACCF.
From the 2005 Virginia harvest we sent
2,378 nuts to cooperating growers, 7,541 nuts to the nursery in
West Virginia, and the nursery
distributed 5011 American chestnut
seedlings to our cooperating growers.
MANY
THANKS
Right up front, we wish to thank all the volunteers who helped with the
2005 chestnut harvest: Tim
Logan, Jack Torkelson, Bruce Engen, Gary Pace, Philip Latasa, Michael
Linder and Steve Prupas.
To pitch in at harvest, e-mail Lucille at
accf@hughes.net for a date and directions. We are likely to begin
picking the burs mornings on the week of September 18, leaving our yard at
9 a.m.; we should begin getting the nuts out of the burs in
afternoons by October 2. We will not be scheduling any harvest
help for the weekends of September 16, 23 and 30 because the home football
games monopolize local accommodations and highways.
A
CHESTNUT PARABLE
Before the deer herd had become a problem, perhaps 20 years ago,
when we did not have enough cooperating growers to plant all our seednuts,
I used to plant the extras along the edges of wildlife clearings in the
National Forest or along the Forest Service Road. Since they were
planted without protection, nearly all of those chestnuts have been eaten.
Fewer than a dozen have survived continuous munching and exist as tiny
bushes. Just one among the hundreds planted has made a great
escape. It is almost 4 inches dbh and 30 feet tall, growing in
semi-shade on the steep bank opposite our driveway. Last winter when
it developed a fist-sized canker halfway up the trunk, I expected the top
to die this summer. However, in September, the only dead
foliage is on a lower branch. Gary's opinion of this tree, Keep an
eye on it. In keeping with the designations assigned to our yard
seedlings, we named this chestnut, G-wiz.
This story illustrates several points: First, it
is unwise to assume that chestnuts can grow into trees without benefit of
protection cages. Second, the larger a chestnut can grow before its
first blight attack, the better its chances to express blight resistance.
Third, it is very important to note when a chestnut is first attacked by
blight and observe its reaction. Fourth, a chestnut which has not
been attacked by blight (blight free), however lovely to look upon, is not
yet anything special. Finally, one observation of a blight resistant
reaction is insufficient evidence; to be included in our breeding
program, the chestnut has to prove itself by surviving five to 10
additional years without death in its crown.
ESCAPES
As more and more enthusiasts comb the woods each year, more discoveries of
large American chestnuts (over 10 inches dbh) are reported. In most
cases these chestnuts are disease escapes, growing in the far north, south
or western edge of the natural range for the species or in a pocket
sheltered from normal wind dispersal of the blight fungus. They may
be blight free or they may have grown quite large before their first
blight attack. Like my G-wiz chestnut, they also bear watching.
Although they are likely to die from blight within a few years,
there is always a chance that some may prove to have durable blight
resistance.
RAISING
AMERICAN CHESTNUTS
The ACCF chestnuts we distribute to you, our cooperating growers, have
much greater chances to express blight resistance. We estimate at
least 10%. The best possible result will be obtained by growers who
plant in well-drained, sandy loam soil, in full sun, on cove slopes facing
North to East at altitudes below 2,500 feet, protecting against injury to
the trunk and leader of each seedling with 5-foot-tall wire caging, and
regularly checking seedlings to deal with other problems as they arise.
The most important site
requirement is that it be well-drained, to avoid the possibility of
root rot. Growers who have discovered root rot among their plantings
should try to limit its spread by fencing off and marking the area with
bright flagging, avoiding work there when the ground is wet, planting
grasses but no seedlings downhill from the infected area and treating
tools, gloves and footwear with a 20% Clorox solution immediately after
use there (for more information, scroll down and see
Phytophthora, in the 2003 Newsletter).
Tree mats
(Forestry Suppliers, Inc.) are helpful in controlling
weeds inside the cages, but they also offer cover for voles
that can nip off the chestnut roots. Weeds and grasses are serious
competition to young seedlings and will greatly retard their growth,
leaving the seedlings at high risk for a longer period. In
very fertile plots we are unable to control the weeds without tree mats.
We lift the mats two or three times a year, pull weeds and put poison
(Prozap) into vole runs and tunnels.
Japanese beetles
can be picked off by hand from lower branches and hit with Sevin on leaves
that are out of reach. Where a plot is isolated, you can spread Milky
Spore over the grassy area to wipe out the Japanese beetle problem.
Ambrosia beetles
can be eliminated if the infestation is caught early in spring and sprayed
with permethrin through that growing season and again in March of the next
year.
When a small chestnut seedling
(under an inch in diameter) is girdled
by blight, the stem can be cut near ground level and the wound
covered with soil. If its root system is healthy, a new shoot will
take over, grow rapidly and give the chestnut a second chance.
Pruning is not
usually advised, but sometimes you need to cut out blighted branches.
This should be done in the fall when the blight fungus is least active.
Cover the wound with pruning seal. When a chestnut has more than one
stem, choose the strongest and cut the others below ground level, cover
these cuts with soil.
The first swollen blight canker often occurs at
the base of a chestnut. We advise making mud
packs to cover basal cankers
through winter dormancy and keep them in place, watering occasionally,
until the seedling is 1.5 inches in diameter.
When the leaves
of a seedling are not dark green,
there may be a nutrient deficiency. This can occur occasionally in a
plot where other seedlings are making healthy growth. We spray
yellowish leaves with magnesium sulfate and repeat the following week if
their color seems to be improving. Otherwise, spray chelated iron
and observe whether it makes a difference. This is quicker and
cheaper than individual soil or leaf tests for each plant.
About midway through the growing season, often the leaves
on the tips of branches in many chestnuts become rumply
and curled up. This is an unidentified disease, possibly a
virus. It is not lethal, but it sharply curtails growth for the rest
of that season. This year we noticed that in many cases the curly
leaves are lighter in color than the other leaves on the chestnut.
We sprayed magnesium sulfate and iron chelate on the curly tips, on the
possibility that the chestnuts are deprived of nutrients. In many
cases, the curly leaves turned a darker green, and in several cases the
seedling resumed production of normal leaves.
GROWERS REPORT
This year I have 406 American chestnut seedlings growing, of which 105 are
from chestnuts planted last winter. My tallest is Pacman E, which
has had swollen blight cankers since 1999. Six of my seedlings are bearing
nuts. My losses are nearly all attributed to voles or blight.
As of December 15, we have received
152 reports, for a total of 10,092
ACCF chestnuts reported. The numbers above will be updated,
as more reports of chestnuts from ACCF distributions come in.
GRAFTERS
REPORT
In the past I have reported some instances of high percentage takes with
bark and cleft grafting methods. Unfortunately, the numbers have not held
up. Many bark and cleft grafts make spectacular growth on incomplete
unions, but for many years they remain highly vulnerable to total
wipeout from high winds. Comparing my notes, I was unable to find
anything to account for this uneven reliability. So I have given up
on them; beginning this year I am making only whip and triangle grafts.
John Elkins still has good success with bark grafts.
I have 90 grafts growing well, of which only 9 are new
this year. My tallest is Thorofare Gap, at 50 feet; it was grafted
in 1991 and has had swollen blight cankers since 1998. Thirty-one of my
grafts are bearing nuts. Losses are attributed to incomplete unions and
blight.
A few of our best grafters have reported early:
Carl Mayfield has 42 ACCF grafts, of which 7 are new this year. Ed
Greenwell has 49 grafts, of which the tallest is 25 feet. Carl &
Ed make mostly nut grafts. Harold Pierce has 6 grafts, of which 3
are new this year; Harold grafts into chinquapin stocks.
NATHAN
PEASE UPDATE
The end of this growing season finds Nathan Pease 25 feet tall, with no
new blight cankers and its one trunk canker surrounded by swollen tissue
which has expanded inward to cover a little of the exposed wood.
We are watching it: two years down and 8 to go.
We thank the National Wild Turkey
Federation for continuing generous support of our cooperative
research with the Virginia Department of
Forestry, USDA-Forest Service and Virginia
Tech, establishing and maintaining forest plots of ACCF
all-American chestnuts.
The Pandapas
plot now has 79 American chestnuts growing. They are mostly first
generation crosses among chestnuts that were not represented in our
original intercrosses: Thompson, NC Champ, Ragged Mt, and JEB.
We also planted some volunteers into which we plan to graft the parent
trees (above). From 2006, we have one JEB graft started.
The tallest chestnut in this plot is a 5-foot (Thompson x NC Champ) from a
nut planted in 2003.
At Turkey Run 18
grafts survive, and two of these are new in 2006; all are in the
(Ruth x Miles) family, F2s. The two grafts killed in 2005 by
ambrosia beetle have sprouted back; time will tell whether these sprouts
come from the grafts or the blight-susceptible stocks. One
graft made male flowers only.
Three seedlings planted in 2002 survive; the tallest is
5 feet. We direct-seeded twelve more chestnuts harvested from a (Ruth x
Miles) F2, by planting them inside 2-feet tall, fine-mesh hardware
cylinders that were sunken a foot into the soil which contained glass
shards; most germinated, but all were killed by voles. To plant
these places we shall try one more time, in winter of 2007, using
seedlings grown from an open-pollinated F2. Most of the work
in this plot is management, cutting the other trees, so that the chestnuts
are the tallest trees and wind dispersal of pollen (perhaps next year) may
be most efficient.
In the Lesesne
State Forest, Nelson County, we have 234 seedlings mostly growing
from various F1 and F2 intercrosses along with a smaller number of
open-pollinated nuts from the parent trees of these crosses.
Sixty-four of these are from nuts planted last winter; some are survivors
from a test planting (to determine whether Phytophthora was still a
problem) in 20 holes which were treated with SubdueMax drench in 2004 and
2005 after the previous seedlings died of root rot. This year, all
seedlings and grafts in the lower half of the 3.4 acre plot received a
dressing of gypsum, which is said to disrupt Phytophthora
reproduction, and the grafts and seedlings near or downhill from the 1980
Thompson and Ragged Mt grafts (which have survived with blight control for
25 years and are now seriously threatened by Phytophthora root rot)
were surrounded with a thick mulch of grass clippings, to inhibit spread
of this root disease. Fungicide treatments are being continued
only within the canopy of the two large grafts, above.
OUTSTANDING COOPERATORS:
John B. Bushmann,
Ken James, Karl Mayfield, and Violet
Pesinkowski continue extensive support for and participation in
American chestnut restoration research.
Philip Latasa
was most helpful during the 2005 chestnut harvest and also
volunteered many hours working in the Lesesne, lopping off ailanthus,
digging and preparing the planting holes, making protection cages and
pruning trees that shaded the planting area.
Jenny & Lizzy
Cooper again spent their spring vacation grafting American
chestnuts.
FOR INTERNET RESOURCES:
Scroll down to the end of the 2005 or 2004 newsletter.
We are a very small, nonprofit foundation,
capable of doing a very big job for American chestnut restoration because
our scientists and officers are all dedicated volunteers and the
Foundation neither owns nor rents property. Thus, we can make
progress with a small budget, because funds are needed only to support the
research, to pay for student assistance in the laboratory and field, for
plot maintenance and supplies, and for correspondence and mailing seednuts
to you, our cooperating growers. The thousands of ACCF American
chestnuts growing in research plots on public lands and on your lands, and
you, our cooperating growers, are the most important assets of our
Foundation. Our rewards are in knowledge reaped from scientific
research and field experience and shared with the public. We thank
you for joining in and supporting our work and look forward to counting
many more of your reports among this year's rewards.
Respectfully submitted,
Lucille
Griffin, Executive Director
Other ACCF Directors:
Gary Griffin, President, Professor of Forest Pathology, Virginia Tech
Dave McCurdy, Vice-president, Superintendent, Clements State Tree
Nursery, WV
John Rush Elkins, Secretary, Research Chemist, Professor Emeritus of
Chemistry, Concord College, WV
William Pilkington, Treasurer, Financial Advisor, Ghent, WV
Ed Greenwell, Director of Tennessee chestnut projects, Electrical
Engineer, Cookeville, TN
American
Chestnut Cooperator's Foundation
The 2005 Seedling Cost is
$40 per 50 or fewer year-old, bare-root American chestnut seedlings
mailed to growers east of the Mississippi. For western growers, the cost
is $50 per 50 seedlings, to cover the additional mailing cost. Seedling
orders need to be submitted on a Cooperating Grower Agreement form (inside
leaf), unless we already have one here on file for you. Make the check out
to ACCF, and please remember to include your annual donation if you have
not already sent it in. Early ordering is strongly advised; we ran out of
seedlings in the beginning of November in 2004.
Everyone who has a Grower Agreement on file with us and has sent in a
donation this year may request up to 15 American chestnut seeds.
But you will need to get your request in early, also: all chestnut seeds
which have not been requested by October 15, will be shipped to the
nursery to make next year's seedlings. We have discontinued the practice
of sending out larger seed lots to individuals or groups. The work of
processing, extracting them from their burs and then the hot water
treatment, 120 F for 20 minutes, is very time-consuming, and we do not
have the capacity to store large numbers of chestnut seed.
From the 2004 Virginia harvest we sent 4,716 nuts to cooperating
growers and the nursery in West Virginia, and the nursery distributed
5544 American chestnut seedlings to our cooperating growers.
The only way to get more than 15 American chestnuts is to help out at
harvest and take up to 100 nuts home with you, in their burs, and process
them yourself. We need volunteer help at chestnut
harvest, usually beginning in the third week of September, to
cut out the burs on the trees ready to be harvested and put burs into dog
food bags marked by mother tree. The seed orchards are in Blacksburg and
Giles County. I usually leave home around 9 and work till noon or until
the work for that day is done. Some days there may be only one tree to
harvest, other days, many. The burs are cut with an extension pole pruner
usually 12 feet long; you hold it overhead, stretching to reach the burs
and bracing against the rope pull that works the blade. It is hard work,
for strong, younger persons. To pitch in at harvest, e-mail Lucille at
accf@direcway.com for a date and directions.
We store the burs in the basement about a week, until many are cracking
open, then extract nuts from the burs, wearing heavy leather gloves,
working outside on a picnic table, usually afternoons, beginning in the
end of September. This is a repetitive job that wears out your hands and
grip. We would be grateful for help with this, also.
Voles are determined miners of American
chestnuts, eating the nuts before they sprout and eating the roots when
they grow below the protection of the tree shelter. Direct-seeding
chestnuts is wasted effort in the face of large vole populations and
nursery plantings may be possible only with special precautions. The bed
should be prepared by digging a trench one foot deep and lining the bottom
and sides with quarter-inch grid hardware cloth before replacing the soil
and planting. The hardware cloth should extend several inches above ground
where it is joined by a ch chicken-wire fence. Poison baits to be placed
in PVC pipes or tire halves can be obtained at feed stores, but they
require daily monitoring to remove the dead voles.
The Asian ambrosia beetle is a tiny pest
which has been found throughout the southeast, from Texas to coastal
Maryland. To reproduce, the female bores pinholes into the sapwood of
young, thin-barked hardwoods. The beetle damage is most serious when it
begins in early March and April, and it continues at lower levels until
fall. While many other tree species may survive, an attack by ambrosia
beetles can be a death sentence for American chestnut because the blight
fungus may enter through the many tiny holes.
Defend against this pest by examining the lower trunk and branches of
chestnuts smaller than 3 inches in diameter at breast height: look for the
telltale pinholes; sometimes a tiny column of sawdust is protruding from
the hole. Check once a week at least, beginning in March and throughout
the season. If any pinholes are found, treat the entire bark surface
weekly with a spray containing permethrin. Prune out heavily infested
stems and burn them. Stems with strong root systems can sprout back if you
cut the stem near ground level and cover the wound with soil.
Here in the Virginia mountains, this is the first year we have found
ambrosia beetle damage. Because so much is at stake in the four research
plots involved, we have been spraying all the chestnut stems 3 inches in
diameter and smaller in these plots. The beetles had been at work for two
months before we discovered them, so we may lose at least six large
grafts. We hope, through vigilance and prompt treatment, that you may be
able to avoid similar losses.
This Grower's Report covers twelve separate
American chestnut research plots: eleven are in three Virginia counties
and one is in West Virginia. Half are in yard or orchard settings and half
are in the forest. I have been planting American chestnuts since 1985.
This year I counted 331 survivors, of which 131 are F2
seedlings (second generation all-Americans). My tallest is Pacman, at
about 35 feet, and three of my seedlings are bearing nuts. Seedling losses
this year I attribute, in order of importance, to poor germination, hungry
voles, blight, Phytophthora, and other unidentified varmints.
As of MAY 8, we have received 141 reports
from growers, for a total of 6639 ACCF
chestnuts reported.
This Grafter's Report covers eight grafting
plots in Virginia, all of which contain seedling plantings, also.
Four plots are in the National Forest. For 2005, I have only 15 new grafts
surviving. From all the years since 1990, I have 111 surviving grafts of
which 26 are bearing nuts. Thirty-eight are F2
grafts, and three of these are bearing. As always, graft failure is the
biggest problem, followed by premature blight infection, undermining of
the root systems by a root rot or voles, and now also, the ambrosia
beetle.
We look forward to reading your grafting reports, and as they are
received, they will be posted in the on-line newsletter here:
Carl Mayfield reports 41
surviving ACCF grafts. Harold Pierce
beginning this year grafting into chinquapin has 4
grafts.
Nathan Pease is the occasional subject of
inquiry. Ed Greenwell named his Pease seedling, Nathan when it showed
precocious blight resistance. You may remember that we began the
blight-resistance trial on a Nathan nutgraft in May 2004, by inoculating
the lowest branch in two places with a killing strain of the blight
fungus. This May the results were disappointing: the level of blight
resistance recorded in the one-year test is very low and would be
insufficient for inclusion in our breeding program. However, there is the
second, long-term test: this spring we inoculated a blight canker on
Nathan's trunk with hypovirulent strains of the blight fungus. A few of
our American chestnuts, which did not test well at first, have since shown
impressive long-term resistance (10 years +).
Breeding: We have just over a hundred control
bags up in six different mother trees. All of this year's intercrosses are
first generation all-Americans, to increase the numbers that may be
available for future testing in several new lines which we started in
previous years. Although the mother trees have demonstrated very
impressive long-term blight resistance, we have learned from past
resistance trials that blight resistance of the parent trees does not
regularly combine. Equal or better blight resistance may be expected to
show up in about 10% of the progeny. This is one reason why breeding for
blight resistance takes so much time.
Another reason is premature infection with the blight fungus. The one-year
resistance test requires trunks blight free and at least 1.5 inches in
diameter at breast height. Before they reach this size, many American
chestnuts have blight on the main stem. This is the case with our large,
bearing F2 grafts. We inoculated their cankers with
hypovirulence and will have to watch them over 10 years, instead of being
able to make selections for the next generation following a one-year test.
Thus, we did not put bags on the F2 flowers.
We thank the National Wild Turkey Federation for
continuing support of our cooperative research with the Virginia
Department of Forestry, USDA-Forest Service and Virginia
Tech, establishing and maintaining forest plots of ACCF all-American
chestnuts.
The Pandapas plot has 96 prepared planting holes, with staked
5-foot weldwire cages and tree mats for weed control. From the 2003
planting, 7 (Th x J) and 7 volunteers (for grafting) have survived. Last
winter, we direct-seeded nuts to fill all the empty spaces for a total of
96 and planted four to six daffodils around each cage in an attempt to
create an area unappetizing to voles. We also made a small nursery
planting with 30 extra from this seed lot in a cold frame in our yard, for
a backup system, in case of poor germination or theft. Only 31 of the
direct-seeded chestnuts germinated and all 30 in the backup nursery were
stolen by voles. The tallest new seedling is 21 inches. We are
contemplating strategies for planting the 51 empty spaces this winter.
At Turkey Run 15 grafts survive. Two each were killed this past
spring by blight and ambrosia beetle. The few new grafts made failed, so
we concentrated efforts to cut back the competing tree species and bring
more sunlight on the grafts and other chestnuts which may be grafted in a
year or two, when they are growing more vigorously. We direct-seeded seven
(Ruth x Miles) to fill the empty places in the small planting area where
three chestnuts from previous plantings survive. Here we had excellent
germination, but one by one, at six to eight inches tall, the five planted
in the bottom row died, their roots trimmed off by voles.
In the Lesesne State Forest, Nelson County, we planted in holes
where nuts or seedlings had previously failed 59 open-pollinated nuts and
12 volunteer seedlings. None of the nuts germinated in the two sections in
which we have a Phytophthora problem, while seven of the small
volunteer seedlings survive there, but with insignificant incremental
growth. We continue to treat with SubdueMax fungicide drench, spring and
fall, most of the lower half of this 3.5 acre plot and also tried a
chicken manure treatment in the spring.
In the 2003 planting section, most of the open pollinated nuts germinated
and 9 have survived. Nearly all of the controlled pollinated nuts
germinated, also: we have 27 (NCC x J), 26 (VT2 x G4) and 12 Pacman. Total
survivors in this planting, including 6 F1
back-crosses to the Floyd parent, are 80. Many of the new seedlings were
at or over 20 inches tall when checked on August 9, and the tallest
2-year-old is 4.5 feet.
In the 2002 planting, 88 of the original F2
seedlings survive, along with 5 F2 grafts and 5
volunteers for future grafting. The tallest seedling is 12 feet. Most of
the losses in this planting have been to Phytophthora.
The western third of the Lesesne plot contains the big 1980 grafts and
many root systems from the original Dietz planting in 1969, some of which
may receive grafts in the future. We have nine new grafts in this area,
along with 12 others made since 2000. Three of the older grafts and one
from this spring have died apparently from root rot, along with two small
seedlings. Ten seedlings survive, although the tallest has yellowing
leaves which might be an early sign of stress from root rot. In addition
to the fungicide drench, we spray yellowing leaves with magnesium sulfate
and amend the soil inside the cage with compost, in case the problem may
be nutritional.
We have gone into detail, to give the newcomers among an idea of some
growing problems in forest settings, as well as any planting place without
very good drainage.
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Dear Friends and Cooperating Growers:
NEW SEEDLING PRICE
We are late figuring the seedling cost this year
because we lost money on last year's distribution. Also, we have learned that
most seedlings sent outside West Virginia are in the mails for as long as 2
weeks, even those going across the river to Ohio. Seedlings now cost
$40 per bundle of 50; for bundles of 25 or fewer, the cost is $23.
We highly recommend that all growers who do not plan to
pick up their seedlings (see below, Open House) and do not live in West Virginia
consider requesting Priority mailing. Priority costs an additional $10
per bundle. When you write your check payable to ACCF,
please remember to add your contribution for 2003 ($20) to the research that
supports these distributions.
The nursery has designated only 4,500 seedlings for
ACCF growers this year, so it is best to send your orders in early.
OPEN HOUSE
1. The West Virginia Forest Tree Nursery where
they harvest the nuts and then grow the American chestnut seedlings which
we have been distributing since 1989, will hold an open house for ACCF growers
on Saturday, December 6, from 10 to 12 a.m.
The nursery is located about 10 miles north of Point
Pleasant, WV, in Lakin, near the Ohio River, on Route 62.
Please note in your order, if you plan to pick up your
seedlings at that time. We can send you a list of motels within a 10 mile
radius of the nursery upon request.
Come and meet Dave McCurdy, John Elkins, and (weather
permitting) Ed Greenwell, ask questions and discuss your growing problems and
solutions.
2. The Airport Research Plot near Virginia Tech in Blacksburg is
the place where we hold spring grafting lessons; there we are making another
demonstration of integrated management for chestnut blight control. We
also have about 2 dozen tiny volunteer chestnut seedlings which may be dug up
and taken home. Lucille can meet you at 10 a.m. on November 8.
Please request directions to avoid being late to this open house. Security
requires locking the gate after entering.
PHYTOPHTHORA
The first symptom of a Phytophthora infection is
premature yellowing leaves, followed by browning leaves and then death of the
stem. When the seedling is dug up, a brownish-black decay is evident on
the fine roots and the structural roots. Unlike chestnut blight,
Phytophthora offers no second chance because it kills the roots as well as the
top.
The ultimate defense is to plant in sandy, well-drained
soils, avoid low-lying and flat land (unless the soil is sandy), and also, avoid
old fields in the Piedmont. In cases where the soils are ordinarily
well-drained but are heavy in texture, unusually wet conditions can slow the
drainage to create a Phytophthora problem.
If the disease is diagnosed in its early stages,
it can be controlled with a fungicide drench (Ridomil or Subdue) applied
following the manufacturer's directions. This is an expensive and
labor-intensive solution which we recommend only where the planting site
is ordinarily well-drained but held water longer than usual because of extremely
heavy and frequent rains.
If you have a Phytophthora problem: put the dead
seedlings directly into garbage bags and send them to the landfill; seed the
planting holes with grass to contain spread of the pathogen, and do not replant
American chestnuts there, or nearby downhill from the
Phytophthora-infested area.
VOLES
They make tunnels in field and forest, feeding on
insect grubs, worms and roots, and like many other creatures they fancy American
chestnuts.
With no voles in the neighborhood, you can protect
direct-seeded chestnuts with a tree shelter about 10 inches tall, driven two
inches into the soil and staked in place. The nut is planted no more than
an inch down and covered with peat moss, and the shelter is surrounded by a 5
foot tall weldwire cage to protect against raccoon, rabbit and deer.
Voles simply undermine this defense and eat the
chestnut root as it emerges below the shelter barrier. The control
recommended for commercial orchards presumes an ability to visit the plot daily;
if you may be able to do this, then contact your County Agent for help.
Other possible courses of action include planting daffodil bulbs (which are
poison) in a wide circle around each chestnut and/or mixing ground glass around
and below each chestnut. More vole control suggestions are most welcome.
NWTF GRANT
This year a National Wild Turkey Federation grant of
$5,000 continues support for planting second generation all-Americans (F2s)
and making grafts of them to test their blight resistance and to establish two
seed orchards on public lands.
For part of this project, we cooperate with the Virginia
Department of Forestry in the Lesesne State Forest. In February,
they cleared an additional acre or so to make more space for planting &
grafting. This past November and March, in last year's planting rows, we
filled the empty places by direct-seeding. This September, I counted 112 F2
seedlings there, (Miles x Ruth) and (Ruth x Miles). Although three of the
seedlings are 6 foot tall and three are 5 foot tall, the majority grew very
little this year because of intense weed competition (over 8 feet tall) and a
non-lethal virus infection on the leaves.
The grafts of these F2s in several sites number
54, but they represent only 40 individuals, and of these it appears that only 5
may be large enough to begin blight resistance testing in May 2004, while the
others will need at least one more growing season to reach the required diameter
of 1.5 inches at breast height.
The test for blight resistance includes inoculation with a
killing strain of the blight fungus, after which the canker growth is measured
over a 2-year period.
Our new seed orchards are under development in cooperation
with the USDA-FS, Blacksburg Ranger District. The Craigs Creek
project now has 22 grafts and 5 seedlings, all from the same controlled
pollination (above). While 7 of them are over 12 ft tall, we did not plan to use
these grafts for resistance testing, but instead, to put them under integrated
management as soon as they are naturally infected by blight.
The final step in integrated management involves regularly
checking for blight and inoculating the first blight cankers (on resistant
individuals) with hypovirulent strains of the blight fungus selected from the
research cultures at Virginia Tech. In May, we inoculated with
hypovirulent strains the first three F2 grafts to be infected with
blight, in 2 other test plots.
In our Poverty Creek project, the Forest Service has cut less
than an acre in a mesic, east-facing cove site where we shall begin
direct-seeding this November to establish a new breeding line with different
parent trees.
LARGE SURVIVORS
Recently there has been a great deal of public interest in
searching for additional American chestnuts which appear to have survived the
blight and therefore might be useful to programs breeding for blight resistance.
While this is a worthy project, our limited personnel and
resources are fully employed and often working overtime. We cannot take
time off to check out a discovery unless the American chestnut is growing in
heavy blight territory, not on the periphery of the natural range, in a forest
setting, at an altitude over 3,000 feet, and it is over 10 inches in diameter at
breast height with visible blight, but no serious crown damage.
No doubt there are numerous survivors which miss the above
description by only one or a few criteria and are therefore well worth the
effort of saving the genes for future testing and breeding. This could be
done best by nutgrafting. Those interested will find a detailed
description of how to make nut grafts in Ed Greenwell's paper at:
http://www.accf-online.org/chestnut/nutgrafting.htm
GRAFTING REPORT
This was a mediocre year for me. I have just 25
new grafts, including two that were made by Jenny Cooper. Overall a
total of 125 of my grafts survive on 9 different sites. Carl
Mayfield reports a total of 50 ACCF nutgrafts, which includes 30 new
nutgrafts this year.
Burnie & Essie Burnworth attended April grafting
lessons and have reported 4 of their grafts at Stronghold, MD, are growing well.
Grafting invitation: learn chestnut-grafting techniques
at Virginia Tech in April of 2004, by appointment on a morning of your choice.
This invitation is open to all growers who send an additional donation to
support ACCF research. Please respond in February, suggest two dates
(from which I could choose one) and indicate how many grafts you plan to
attempt, so that we may have enough scionwood to share with you.
GROWERS' REPORT
If you followed our recommendation to plant on
well-drained sites, 2003 was a great growing year throughout the East.
I have counted 191 survivors, and my tallest from a
2002 nut direct-seeded is 2 feet! A few of my 2- and 3-year-olds have
doubled their height. While our Western growers hauled water, we pulled
weeds and cut competing trees. American chestnut seedlings hardly ever
succeed without a good deal of work.
Ed's Nathan Pease American chestnut is still
looking good, but my graft of it will not be large enough to begin its
blight-resistance test until 2005.
Thanks very much for reporting! We have so
far received reports from 114 growers of 4,166 ACCF chestnuts
surviving in 2003. Sometimes I wonder if everyone understands that total of ACCF
seedlings surviving means the grand total for all years plantings. We
accept additions and corrections. Late reports will be added
to the above numbers as they are received..
This past year we sent 7,627 seedlings and 6,917 seednuts
to cooperating growers in 37 states and Ontario.
SEEDNUTS
We are expecting a smaller crop of seednuts here in Virginia
because of the very heavy and frequent rains during pollination time.
Each grower may request 15 nuts, but we will probably run out of seed
earlier than we did last winter (January 21).
I did not put many control bags in the Miles and Ruth
grafts, thus many more of their open pollinated nuts may go out to our most
reliable, reporting growers.
Looking out our dining room window, I saw female
flowers in our Pie chestnut's crown. In between rains, I tossed into
its upper branches the catkins leftover from this year's controlled crosses.
These father trees may give this year's Pie nuts many more interesting
possibilities, so they also will go only to our growers who have reported.
HARRY HOTINE SCHOLARSHIP
We have awarded the graduate student, Eric
Hogan, a research scholarship in memory of my father, a self-educated man
who knew and loved the trees, all the Latin as well as common names, and was a
great believer in education and hard work. With this scholarship we
recognize Eric's contribution to American chestnut research through long hours
of careful work in the laboratory.
OUTSTANDING COOPERATORS
Many thanks again to John Buschmann, John
Buschmann, Jr, and the Jones Family for pitching in and supporting
our work in the Lesesne State Forest.
Once again, Violet Pesinkowski (NY) and Carl
Mayfield (VA) have been extremely generous in support of the graduate
student research at Virginia Tech.
Mark Depoy, Mammoth Cave National Park, (KY) was
responsible for planting 2,000 additional ACCF seedlings in our National
Parks.
Thanks to Jason Kramer for engaging Biology and
Botany students at Yough High School in a large project, raising American
chestnuts from seed, planting them on Pennsylvania State Game Land and sending
us an A+ report.
Thanks to John Knouse, who once again sponsored and
manned an ACCF booth at an environmental fair in Athens, Ohio, we have many
additional Ohio growers. And Laurie Spangler set up an ACCF exhibit
at the Mill Mountain Zoo near Roanoke, VA.
Ken James (NY) continues his efforts to maintain and
expand the largest American chestnut forest revival project outside Virginia.
Charles Lytton, (VA) Giles County 4-H Leader,
continues work with area school children, organizing help for harvest at the
Martin American Chestnut Planting, as well as spring field trips to area
chestnut-growing projects involving the children in planting, maintenance and
reporting; he also distributes seednuts to school growing projects.
We now have over 1,000 on the mailing list and look forward
to news about all those American chestnuts.
Respectfully submitted,
Lucille Griffin, Executive Director
Other ACCF Directors
Gary Griffin, President, Virginia Tech
Forest Pathology
Dave McCurdy, Vice-president,
Superintendent, Clements State Tree Nursery, WV
John Rush Elkins, Secretary,
Professor Emeritus of Chemistry, Concord College, Research Chemist, Beckley, WV
William Pilkington, Treasurer, ChFC, Cool
Ridge, WV
Ed Greenwell, Director of Tennessee
chestnut projects, Electrical Engineer, Cookeville, TN
Return to the American Chestnut Cooperators' Foundation home page.