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EAB found in Door County, Wisconsin

Add Door County to the list of counties in the state with Emerald Ash Borer. The tree-killing insect was found south of Fish Creek in the Town of Gibraltar last week and confirmed by USDA on Tuesday. The discovery was really no big surprise given the amount of tourism in Wisconsin’s “thumb”.

As a result, Door County will be quarantined, prohibiting ash wood products and hardwood firewood from being moved out of the county to areas that are not infested.

There are now 22 counties under quarantine in Wisconsin: Brown, Crawford, Dane, Dodge, Door, Douglas, Fond du Lac, Jefferson, Kenosha, La Crosse, Milwaukee, Ozaukee, Racine, Rock, Sauk, Sheboygan, Trempealeau, Vernon, Walworth, Washington, Waukesha and Winnebago.

EAB adults lay eggs on the bark of ash trees in mid- to late summer. When the eggs hatch a week or two later, the larvae burrow under the bark for the winter and eat the wood, forming the characteristic S-shaped tunnels and destroying the tree’s ability to take up nutrients and water. In summer, the adults emerge through D-shaped holes in the bark.