Emerald Ash Borer

From representatives of the Wisconsin Department of Natural Resources, April 20, 2015:


Dear Community Foresters – This email contains information on Emerald Ash Borer Treatments. Now that we’re into the second half of April, it’s time to consider the timing of EAB insecticide treatments.

For 2015, folks should adhere to the EAB treatment timing recommendations in the publications below.
• For most trunk injections, treat after ash leaf-out, but before late-May.
• For most other soil drenches and soil injections, treat by mid-May. This will allow for enough time to distribute the insecticides throughout the tree before larval feeding begins. Larger trees will require more time to thoroughly distribute the insecticides and may require a higher application rate.
• EAB adult emergence typically begins in early June in southeast Wisconsin.
• Be sure to double check the product label for specific timing and application rate recommendations.
There have been some questions on the availability of ArborMectin (a product with the same active ingredient as Tree-äge). It was temporarily unavailable, but is now again available for purchase. See their website for more information http://www.arbormectin.com/

Below are links to UW-Extension’s insecticide treatment recommendations. The last link is a more detailed, multi-state document. (All can be linked to from Wisconsin’s EAB website.) Note: DNR does not endorse any specific insecticides or products. Follow the product label.
Professional Guide to Emerald Ash Borer Insecticide Treatments
Homeowner Guide to Emerald Ash Borer Insecticide Treatments
Is My Ash Tree Worth Treating For Emerald Ash Borer?
Insecticide Options for Protecting Ash Trees from Emerald Ash Borer (more detailed)

Press Release
There was a recent DNR news release urging homeowners to consider treating their ash trees, http://dnr.wi.gov/news/Weekly/article/?id=3260. You may get calls on this. Feel free to modify the article if you want to do your own press release. Quotes need to be new though. If you want to use those, please contact the person you’re quoting.

Many communities simply refer residents with questions to Wisconsin’s official EAB website, www.emeraldashborer.wi.gov. Some simply put this link on their community website for all things related to EAB.

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