WeevilTrak Blog | GreenCast | Syngenta
Welcome to the WeevilTrak℠ blog, offering you updates about annual bluegrass weevil (ABW) from industry leading researchers. This blog will provide you with timely ABW activity across the north east as well as advice on scouting and controlling them using the Optimum Control Strategy.

Latest Posts: Dr. Ben McGraw

Weevil update from Pennsylvania

The past week was relatively cool in most parts of Pennsylvania, with only a few Growing Degree Days (GDDs) being accumulated. Our research sites in western and central Pennsylvania accumulated 4 and 12 GDDs (Base 50°F) respectively, between April 22 and 28.

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This is Only the Tip of the Iceberg

Our lab spent much of the week looking for annual bluegrass weevil (ABW) adults, and trying to get a handle on where the majority of the adult population is located. Vacuum sampling between overwintering sites and short turf areas revealed that the vast majority of weevils in central Pennsylvania (> 95 percent at most sites) are still in the roughs. We found several sites where some weevils had made it all the way to the fairways, but most, if not all, were in south-facing turf stands, which are likely to warm up faster than other areas of the course.

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