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. Stan Swier

April Northern New England Update

This year I will continue to monitor five sites for WeevilTrak. As of April 8, all courses are ahead in growing degree day accumulation compared to last year.

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Evaluate Now, Plan for Next Year

As the weevil population winds down in northern New England, it's not too early to plan for next year. While your memory is still fresh, ask yourself what worked, what didn't. If you took good written records, you have the data you need. If you didn't write it down, do it now while you can still remember

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First Generation Weevil Update from Northern New England

It's June 21st and the first generation of ABW is over for many courses.Overall, those that followed the WeevilTrak program had good results controlling the overwintering adults and first generation larvae.

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How do we compare to last year?

It's always fun and helpful to compare present pest and cultural problems to the past. Did this problem occur earlier, or later than last year? Are we ready, or are we too late to control this problem? Of course, the problem I'm talking about is the Annual Bluegrass Weevil.

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Where's Spring?

It's March 30 and some of the courses in northern New England still have snow cover at 70 percent or more.

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As they say in New England, “If you don't like the weather...”

The week of May 15 was cold, so the weevil larvae just weren't growing much. Then, on May 22, the thermostat turned up. Since the larvae would begin to grow quickly, we moved the flag to Stage 3 to apply Ference® insecticide. Ference is the perfect solution for the situation we are in.

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The View from Northern New England

When the temperature hit 78°F in central New Hampshire on March 9, I thought we were in for a very early, spring weevil emergence. But the recent cooler weather stopped the weevil emergence. So, relax and be patient. The first adult spray at half green, half gold Forsythia will not be for awhile.

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Heat and Drought Hit the Northeast

Much of the Northeast is in a moderate drought. According to the National Weather Service, so far this spring precipitation is about 40 percent less than normal. This drought stretches from eastern Pennsylvania, eastern New York, to all of New England.

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Weather, Adult Emergence and Plant Phenology

It has been very cool and wet the last few days in northern New England. The weather has stalled the accumulation of degree days and the development of forsythia. It may be cool the rest of the week. Degree day accumulation is about six days behind last year. Forsythia are just starting to bloom in southern locations. The first adult emergence on my annual bluegrass weevil (ABW) monitoring sites was in Manchester, Vermont on April 20.

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Adult Emergence, Don't Panic!

Before WeevilTrak™, there was more confusion as to timing and choice of insecticides to control the annual bluegrass weevil (ABW). This confusion led to overuse of insecticides, poor timing and application of the wrong product - often leading to poor control and insecticide resistance. While discussing this problem with a DuPont research manager, we developed the concept of WeevilTrak, providing timely information to the superintendent to effectively manage weevils and minimize pesticide applications.

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