News for Immediate Release
Harrisburg – Four additional Pennsylvania
counties are quarantined effective immediately because of the detection of
Thousand Cankers Disease found in trees in Chester County.
restricts the movement of wood and wood products from
Chester, Delaware, Montgomery and Philadelphia Counties and other states known
to have the disease. This is the second detection of Thousand Cankers Disease
in the state. Bucks County was quarantined in 2011.
was found in fields with black walnut trees in Franklin, London Britain, and
Lower Oxford townships in Chester County. Samples were verified by the state
and federal departments of agriculture.
Cankers Disease poses a significant threat to the state’s nation-leading hardwoods
industry,” said Agriculture Secretary George Greig. “I urge Pennsylvanians to
comply with the quarantine restricting the movement of wood from the five
southeastern Pennsylvania counties.”
is caused when Walnut Twig Beetles, which carry a fungus, tunnel beneath the
bark of walnut trees, causing small cankers to form. The beetles, dark brown
and similar in size to a poppy seed, are extremely difficult to detect. As more
beetles attack the tree, the number of cankers increases, slowly starving the
tree of nutrients and causing the tree to die within 10 years of initial
symptoms of the disease are yellowing of leaves and foliage-thinning of the
upper crown of the tree. As the disease progresses, larger limbs die followed
by the trunk.
walnut trees, which make up less than half of one percent of hardwood trees in
Pennsylvania, produce high-valued lumber used in woodworking and
furniture-making. The nuts of the trees are consumed by humans and wildlife.
quarantine restricts the movement of all walnut material including nursery
stock, budwood, scionwood, green lumber and firewood. It also covers other
walnut material living, dead, cut or fallen including stumps, roots, branches,
mulch and composted and uncomposted chips. Due to the difficulty in
distinguishing between species of hardwood firewood, all hardwood firewood is
quarantine also restricts the movement of walnut material and hardwood firewood
from states known to have Thousand Cankers Disease including Arizona,
California, Colorado, Idaho, Indiana, Maryland, Nevada, New Mexico, North
Carolina, Ohio, Oregon, Tennessee, Utah, Virginia and Washington.
processed lumber and finished wood products without bark are exempt from the
with the quarantine order could result in criminal penalties of up to 90 days
imprisonment and a fine of up to $300 per violation, or a civil penalty of up
to $20,000 per violation.
species of wood-boring insects, including the Walnut Twig Beetle and Emerald
Ash Borer, can be spread through transport of infested firewood and logs,
campers and homeowners are encouraged to: use only locally harvested firewood;
burn all of it on-site; and not carry it to new locations.
department is working with other state and federal agencies and Penn State to
survey for walnut twig beetles and slow the spread of Thousand Canker Disease,
for which there is no known cure.
suspect they have seen Thousand Cankers Disease or walnut twig beetles should
contact their local county cooperative extension office or call the
department’s hotline at 1-866-253-7189. Visit www.agriculture.state.pa.us and search “Thousand
Elliott Krepps, 717-787-5085