The boundary expansion became necessary this fall after infestations
of the tree-killing beetle were confirmed for the first time in
Henry and Knox counties. The pest was discovered in Henry County at
a park on the northwest side of Kewanee through the department's EAB
trapping program and in Knox County by alert grounds staff at Knox
College in Galesburg.
which now covers 40 percent of the state, is intended to prevent the
artificial or "human-assisted" spread of the beetle through the
movement of infested wood and nursery stock. Specifically, it
prohibits the movement of the following items from quarantined
Bark from ash
trees and wood chips larger than 1 inch from ash trees.
Ash logs and
lumber with either the bark or the outer inch of sapwood, or
Any item that is
made from or containing the wood of the ash tree and is capable
of spreading the emerald ash borer.
Any other article, product or means of
conveyance determined by the Illinois Department of Agriculture
to present a risk of spreading the beetle infestation.
The emerald ash borer is a small, metallic-green beetle native to
Asia. Its larvae burrow into the bark of ash trees, causing the
trees to starve and eventually die. Since the first detection of the
pest near Detroit, Mich., in 2002, it has killed more than 25
million ash trees.
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The beetle often is difficult to detect, especially in newly
infested trees. Signs of infestation include thinning and yellowing
leaves, "D"-shaped holes in the bark of the trunk or branches, and
basal shoots. Anyone who suspects an ash tree has been infested
should contact their county Extension office, their village forester
or the Illinois Department of Agriculture.
In addition to Henry and Knox, the EAB quarantine now includes
Boone, Bureau, Champaign, Clark, Coles, Cook, Cumberland, DeKalb,
DeWitt, Douglas, DuPage, Edgar, Effingham, Fayette, Ford, Grundy,
Iroquois, Kane, Kankakee, Kendall, Lake, LaSalle, Lee, Livingston,
Macon, Marion, Marshall, McHenry, McLean, Moultrie, Ogle, Piatt,
Putnam, Shelby, Stark, Vermilion, Will, Winnebago and Woodford
The full quarantine order and detailed information about the EAB
program can be accessed on the Internet at
Department of Agriculture
file received from the
Illinois Office of
Communication and Information]