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

Where has all the damage come from?

In my last Weevil Trak blog ( "Where have all the weevils gone?" ), I lamented on the fact that I might be out of a job since we had come to the end of July, and I had not seen the kind of destruction that we would expect with the challenging spring weather. Since that time, I have received a steady amount of calls and reports of widespread damage.

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Where Have all the Weevils Gone?

The 2016 ABW season was (and still possibly is) lined up to be a very challenging year, especially with the earlier-than-normal start to the season, a couple of cool stretches in spring and now with extreme drought conditions persisting across the region. With the stop-go egg laying patterns, larval populations have become spread out over time, leading to confusion in the timing of sprays, or even the determination of which generation is present.

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The problem with pupae….

This spring was unusual, though as we approach July, ABW stages appear to be more in-line with previous years. We will have completed Generation 1 by the end of the week in many parts of Pennsylvania. But I would expect that many populations in the Pittsburgh area still have a decent percentage of insects in the pupa stage.

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Buckle Up

2016 is shaping up to be the inverse of 2015. The hot and dry conditions in May 2015 accelerated the development of larvae, and larvicide applications were warranted shortly after adulticide applications. Last year, optimal timing for adulticide applications occurred on May 1 in central Pennsylvania

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Even in Stage 1, Waiting can be your Best Bet

All three of the sites that our lab monitors for WeevilTrak advanced to Stage 1 (Apply Adulticides) during the last week (April 18-22). These areas include central Pennsylvania to northern Ohio. In all three cases we had a very prolonged Forsythia full bloom (> 3 weeks).

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Practicing Patience

We are hurtling toward the start of ABW season in central and western Pennsylvania. This has been a bizarre season so far, but we have come to expect unpredictability in the spring given the last few winters.

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The end is near

I have received quite a few reports of ABW damage in the last few weeks, occurring on golf courses from northern New York to southern Virginia. The reports are somewhat surprising from a weevil population dynamics standpoint.

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Looking back to look forward in ABW Management in 2015

2015 has been a wacky year for weather and in turn, insects. The benign conditions have allowed insect pests, including Annual Bluegrass Weevil (ABW), to hang on longer than normally anticipated.

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Time To Be Hyper-Vigilant About Annual Bluegrass Weevils

Last week was the first big flush of first generation (summer) adults that we have observed in central Pennsylvania. You might be wondering, "I am just reading this now! Am I too late in making an application?" I don't think so.

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Preparing for Larvicide Applications in Pennsylvania

We have had a rapid change in the development of our annual bluegrass weevil (ABW) populations in Pennsylvania since my last blog entry (though it appears we are in a slight cool down at the moment).

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