Governor proclaims thousand cankers disease a threat to Illinois'
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[February 13, 2012]
SPRINGFIELD -- Gov. Pat Quinn has
proclaimed thousand cankers disease, or TCD, to be a viable threat
to Illinois' native black walnut tree population. As a preventive
measure to protect the economic and environmental well-being of
Illinois' walnut tree industry, Quinn approved regulatory measures
this month to restrict the movement of potentially infested products
"Illinois has 2.3 million acres of forests that may contain
black walnut and be susceptible to this disease," said H.W.
Devlin, acting director of the Illinois Department of
Agriculture. "Though TCD currently is not known to be here,
these measures were warranted to protect our state's walnut
Thousand cankers disease is a highly contagious,
invasive fungus primarily affecting North America's black walnut
tree population. It is spread by the walnut twig beetle, or WTB,
which introduces fungal spores into the tree when forming
galleries in the phloem. The fungus colonizes the area around
the galleries, forming cankers that cause a disruption of the
flow of nutrients throughout the tree, resulting in dieback,
decline and eventually, death of the tree.
Because there are no current management strategies for TCD,
the regulation of product movement is necessary to protect
Illinois' walnut trees and walnut tree industry.
Individuals and businesses wishing to move regulated
materials into or through Illinois that originate in an area
infested with thousand cankers disease now must enter into a
compliance agreement with the Illinois Department of
Agriculture. The materials must be accompanied by a
phytosanitary certificate from the originating state, verifying
they comply with the conditions of the compliance agreement. All
regulated materials originating in areas not known to be
infested with thousand cankers disease now must be accompanied
by proof of the harvest location of the wood by county and
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"Regulated articles" are defined as the following:
All plants, plant
parts and products of the genus Juglans; articles of Juglans,
including but not limited to logs, green lumber, firewood,
nursery stock, bark, mulch, burls, stumps and packing materials.
Any of the above
said materials passing through a known infested state,
regardless of origin.
All life stages of
the walnut twig beetle (Pityophthorus juglandis).
All life stages of
the Geosmithia fungus (Geosmithia morbida).
Any article, product or means of
conveyance when it is determined by the Illinois Department of
Agriculture to present a risk of spread of the walnut twig
beetle or the Geosmithia fungus. Exceptions are nuts, nutmeat
and hulls, processed lumber (100 percent bark-free and
kiln-dried, with squared edges), and finished wood products
without bark, including but not limited to walnut furniture,
musical instruments and gunstocks.
For more information regarding TCD, visit the Illinois Department
of Agriculture's website at
www.agr.state.il.us and click on the "Thousand
Cankers" link (PDF) on the right on the home page.
Illinois Department of
Agriculture file received from
Illinois Office of
Communication and Information]