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University of Illinois Extension serving Carroll, Lee and Whiteside Counties

Main Office (Lee County)
Sauk Valley Community College
173 Illinois Route 2, IF5
Dixon, IL 61021
Phone: 815-835-2070
FAX: 815-835-2073
Email:uie-clw@illinois.edu

Branch Office (Carroll County)
807D S Clay St
Mt. Carroll, IL 61053
Phone: 815-244-9444
FAX: 815-244-3836

Branch Office (Lee County)
280 W Wasson Rd
Amboy, IL 61310
Phone: 815-857-3525
FAX: 815-857-3527

Branch Office (Whiteside County)
100 E Knox Street
Morrison, IL 61270
Phone: 815-772-4075
FAX: 815-772-4077

News Release

Emerald Ash Borer is on the Move

Infestations of the emerald ash borer are now common in northeastern Illinois and have been found as far south in Illinois as Marion County. With a recent infestation discovered in Macon County, University of Illinois entomologist Jim Appleby reminds people that it is unlawful to transport firewood, ash logs and trees from quarantined areas because emerald ash borers might be in the wood.

"The latest Illinois emerald ash borer quarantine map on the Illinois Department of Agriculture website covers nearly 40 percent of the state," Appleby said. "Adult beetles will emerge from infested ash trees and logs during the months of May, June, and July so it is very important not to transport firewood from place to place to prevent the spread. Campers should only purchase firewood produced near their campsite.

"I've already received many phone calls from homeowners requesting how they can tell whether their ash tree is infested," he said.

Appleby created a four-page full-color leaflet containing photographs to help identify ash trees and the ash borer. It includes photos of the life stages of the borer, infested tree symptoms, and photos of other insects that are sometimes confused with the emerald ash borer.

A printable order form for How to Diagnose, Detect, and Search for Infestations of the Emerald Ash Borer, which costs $2 is available at nres.illinois.edu/Appleby_Emerald_Ash_Borer or by contacting Beth Leamon, (217-333-2770, eleamon@illinois.edu). A discount is offered for orders of more than 100 copies.

The leaflet can also be downloaded as a pdf at http://nres.illinois.edu/Emerald_Ash_Borer.

Appleby said if an ash tree is located within 15 miles of a confirmed infestation, homeowners should consider treating the tree. Treatments with insecticides containing imidacloprid have proven to be effective in killing the borer. A brand currently available is Bayer Advanced Garden Tree and Shrub Insect Control.

"The chemical has to get to the tree roots to be effective so it is very important after treatment that at least an inch of water be applied to the treated area," Appleby said. "If there is mulch around the tree, remove the mulch, apply the treatment, replace the mulch and then apply water to that area. Other insecticide treatments can be professionally applied by contacting a certified arborist," he said.

Source: Debra Levey Larson, Media Communications Specialist, dlarson@illinois.edu