DNR Recommend Insecticide to Protect Against Emerald Ash Borer
Sunday, April 7th, 2019 -- 6:27 AM
State forest health specialists recommend homeowners consider insecticide treatment of healthy, valuable ash trees to protect against Emerald Ash Borer.The Department of Natural Resources says the pest kills more than 99 percent of the trees it infests and is currently the biggest threat to Wisconsin's ash trees. While some EAB larvae may have been killed by cold winter weather, it is unlikely frigid temperatures were enough to delay ash tree mortality in most parts of Wisconsin, said DNR forest health specialist Bill McNee. He says insecticide treatments to protect ash trees are usually applied between mid-April and mid-May, so it is important to start planning now.
The highest risk of EAB infestation is within 15 miles of known activity, but it is widely believed that additional, undetected infestations are located throughout the state. For a map of known infestations in Wisconsin, visit the Wisconsin EAB portal. Treatments are not economically practical for ash found in woodlots. Any questions about woodlot management can be directed to a professional forester.
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