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: April 2018

April Fooled…or Just a Test of Patience

One of the hardest decisions to make in turf management is the decision to do nothing. Many times this applies to what to do when turf is under the most stress during the summer months. In most cases in the mid-Atlantic, April is the part of the season when turf is just starting to show signs of vigor and there aren’t many dire moment...then comes the challenge of adult annual bluegrass weevil (ABW) control.

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Is spring finally here?

Many of us cannot remember a spring this cold in the Mid-Atlantic region. Many golf courses have not even sprayed a fungicide yet, and typically by this point they have already made at least one, sometimes two, applications. But, in my travels to northern Virginia and throughout most of Maryland and the eastern shore during the past week, it looks like annual bluegrass weevil (ABW) adults will peak sometime between April 27 and May 10.

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Season opener

We are nearing the end of April and are currently running about 100 growing degree days (GDD) behind where we were in 2017 in central and western Pennsylvania and northeast Ohio. All three sites were past the time for Stage 1 (apply an adulticide) in mid-April 2017. This year, we have been hanging on to the Forsythia full bloom stage (start of adult migration) for well over 10 days.

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A Very Slow Start for ABW in Southern New England

The annual bluegrass weevil (ABW) season is off to a very slow start in southern New England. We are monitoring five sites for the Syngenta WeevilTrak program, and most of those sites had only accumulated 10 degree days or less as of April 22. That makes it the coolest spring we have tracked since we began the program in 2009.

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They’ve Finally Arrived

Been a long time coming, but annual bluegrass weevil (ABW) season is officially here. Because we are monitoring in completely different regions of western North Carolina and adult weevil timing differs so significantly between sites, the format for WeevilTrak in North Carolina is going to be different than in previous years.

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The weevils are marching in, in spurts

In my last blog in March, I speculated about the effect of the two-week spell of very cold weather around the New Year on annual bluegrass weevil (ABW) populations. I was not going to bet on it affecting the weevils significantly, and, sure enough, they seem to be finally coming out in good numbers at my two sites. But the generally cool weather, not surprisingly, is holding them hostage only to release them in spurts whenever there is a period of warm weather.

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