Tree-Äge receives Michigan SLN registration for control of emerald ash borer

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

The Michigan Department of Agriculture has approved a special local needs (SLN) registration for Tree-Äge under section 24(c) of the Federal Insecticide Fungicide and Rodenticide Act. The registration is effective April 1, 2008. You may have heard this new trunk injection product referred to as emamectin benzoate or EM. This product was tested and developed for control of emerald ash borer as a result of a cooperative research project with Michigan State University, Syngenta and Arborjet. Results from an efficacy test in Troy, Michigan conducted by. David Smitley indicate that you can expect 95 percent control or better for two growing seasons after a late May or June trunk injection.

In a 2007 study led by Deborah McCullough and Therese Poland, 100 percent of adult EAB beetles that fed on leaves from treated trees died in bioassays conducted during the summer. The density of live larvae in treated trees was 99 percent lower than the density of larvae in untreated trees on the same sites. Although several additional studies are underway, at this point it appears that Tree-Äge will provide excellent control of EAB for two years. More information about the Tree-Äge product is available on the web site. Special registrations for this product were also approved this spring in West Virginia, Indiana and Ohio.

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