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.

Archive: May 2020

Time to control all larval stages: ABW stages likely to be all over the place

Yes, Steve McDonald is right: it is a mess! The crazy weather patterns must have the annual bluegrass weevils (ABWs) about as confused as you.

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What a mess

In my career, I thought I had heard every question possible from golf course superintendents until this week. I had a superintendent ask me if I thought the Coronavirus could kill annual bluegrass weevils (ABW)…… I honestly could not answer him seriously, but I did laugh and say “I don’t think so, you are probably going to need to mitigate with an insecticide.”

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It’s May in North Carolina and you know what that means…

…it’s (typically) the busiest time for annual bluegrass weevil (ABW) and management in North Carolina. If ever you were going to pick a time to monitor, this should be it.

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Annual bluegrass weevil update for May 18, 2020 in Virginia – Peak larval time happening throughout Virginia

The graphs below show the annual bluegrass weevil (ABW) adult (top graphs) and larval densities (bottom graphs) per square foot from the Federal Club in Richmond, Virginiasampled by Jordan Booth, Ballyhack Golf Club in Roanoke, Virginia, and Blacksburg Country Club, sampled by Emeline Daly since March 2020.

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Weevil Trak Blog for May 13th, 2020: Stuck in first (instar) gear

We have been experiencing an extremely cold stretch of weather in Pennsylvania and Ohio over the last couple of weeks, including two days where we woke up to snow on the ground in State College.

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Timing adulticides was a shot in the dark: better to rely on larvicides this spring

At Pine Brook Golf Course, annual bluegrass weevil adult numbers determined by soaping have been low all spring (no higher than 0.67 per 1 ft.2 on the fairway).

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Annual bluegrass weevil update for May 3, 2020 in Virginia – Small larvae are abundant in Roanoke and Blacksburg samples this week

As of May 3, 2020, good degree days (GDD) are 365, 240 and 175 GDD, respectively, as you move up in elevation from Richmond, Roanoke to Blacksburg.

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Scouting for adult weevils in western New York

It is Monday morning, May 4, 2020. My first blog ever. Most superintendents with whom I communicate state that they wanted to wait for their first adulticide to whack the weevils. I agree. As you would expect, on the near 50° days when the sun came out, I could vacuum a low number of weevils. Every day this season, when scouting for adult weevils, I've collected a low number of weevils. It's when numbers go up and stay up, that I recommended an application based on WeevilTrak recommendations to nuke the adults.

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