Tuesday, June 17, 2025

Grape Root Borer Mating Disruption is Back

Hello, everyone, Grape root borer is a clearwing moth native to the southeastern US, the larvae of which feed on grape roots, each larva feeding for two years. Adults appear in late June, and resemble paper wasps. This pest can be extrememly destructive, making blocks unproductive, often killing vines. More information on GRB is posted here. As many of you know, mating disruption has been the most effective management tool for grape root borer since it first received and EPA label in 2011. The commercial product, Isomate GRB, became unavailable for the 2024 season. When it became apparent that a replacement label would not be available for an extended time, we worked on an effort to apply for a Section 18 emergency registration. Thanks to combined efforts of many, the label was approved in time for the 2025 season. I am creating links relating to the new product, Isomate GRB Z, here to the approved Section 18 Label for Virginia, a press release, and a press release, and a fact sheet. More later. Doug P.
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