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Chicago Emerald Ash Borer Central

Latest Emerald Ash Borer Information

New Preventative Treatment for EAB

Posted by Ron Wolford -

Illinoisans will now have an effective alternative to tree removal in their arsenal against the Emerald Ash Borer, a deadly wood-boring beetle that has plagued Illinois and North America long before its initial discovery in 2002.

The Illinois Department of Agriculture on April 15th, approved a special local need request for the use of Tree-Age, an insecticide touted as the most effective chemical weapon against EAB. Nearing 100 percent effectiveness, the product, developed by Swiss agrochemical company Syngenta and Massachusetts firm Arborjet, has an active ingredient called emamectin benzoate which is injected directly into the ash tree's vascular system where EAB larvae feast. The direct injection affects only the beetle larvae and will not harm anything coming into contact with the tree such as butterflies, birds and squirrels.

After yearlong preliminary studies, Michigan and most recently, Indiana officials have approved the chemical. Based on results in Michigan, preliminary evidence suggests that a single treatment could provide up to two years of control.

Ideally intended as a preventative treatment for healthy, non-EAB-infested trees, Tree-Age is most suitable for trees in close proximity to EAB-infested areas.

"IDA encourages property owners to consult with a certified arborist or tree care company to discuss treatment pricing and other options suitable for their situation," says Warren Goetsch, bureau chief of Environmental Programs. "Cost will be a factor for most homeowners.

This tool will most likely be used by golf courses and other landscape areas where entire canopies will be devastated affecting local commerce."

The emerald ash borer is difficult to detect, especially in newly-infested trees. Citizens should watch for metallic-green beetles about half the diameter of a penny on or near ash trees that are showing signs of disease or stress. Other signs of infestation in ash trees include D-shaped holes in the bark of the trunk or branches and shoots growing from its base.

Anyone who suspects a tree has been infested is urged to contact their county Extension office. For more information, visit on the internet.

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