By Bill McNee, DNR Forest Health Specialist, Oshkosh, bill.mcnee@wisconsin.gov, 920-360-0942
Emerald ash borer (EAB) reports continued to grow across Wisconsin in 2020. The total number of communities with EAB was 808 as of December, an increase of over 50% since the start of 2020. In addition, the insect was confirmed for the first time in six additional counties (Dunn, Florence, Oconto, Pepin, Price and Shawano) during 2020. EAB has now been found in 58 of Wisconsin’s 72 counties and confirmed on Oneida Nation land. Additional unreported infestations are widely believed to be present.

Municipal (green) and Tribal (blue) EAB detections in Wisconsin as of Dec. 10, 2020. Map created by the Wisconsin Dept. of Agriculture, Trade and Consumer Protection.
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