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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

Central PA to OH: The final push for Generation 1

It has been a month since my last blog post. At that time, adulticide applications were being made in western Pennsylvania, and central Pennsylvania and northern Ohio were trailing a week or so behind. Rhododendrons were in full bloom in Pittsburgh on Monday making the end of this week to early next week an ideal time to target larvae with an insecticide.

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Start getting ready for curative ABW larvicides in central NJ, not quite there, yet, in northern NJ

This week I have two very different scenarios to offer, and I am scratching my head over it. In central New Jersey at Pine Brook Golf Course, adult densities have started to go down. Meanwhile, larvae are thriving.

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Time for early ABW larvicides in central NJ, getting there in northern NJ

While adult ABW densities stay high, small larvae have started to show up on fairways in central and northern NJ. In fact, at both Pine Brook Golf Course (Manalapan, NJ) and Preakness Hills Country Club (Wayne, NJ) we just recorded the highest adult densities yet this season.

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First larvae showing up in Massachusetts

The samples we received from two of our cooperators (Chicopee, MA and Albany, NY) had a couple second instars in them this week. The warm weather we experienced last week apparently induced a few adults to begin to mature and lay eggs. We are now back in a holding pattern of sorts.

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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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Change is finally on the way in New England

March and the early part of April were quite cool, so the overwintering weevils did not start moving at many southern New England locations until last week. Last week we recovered almost 10 weevils, but this week we found almost 40 weevils - and took fewer samples. This suggests that our overwintering adults are finally beginning to move out toward the shorter cuts of grass.

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Full Speed Ahead in Mid-Atlantic

We have now officially pulled up the anchor in Northern Virginia and Maryland and ABW populations are running at full speed. We've accumulated over 200 GDD in short bursts since April 1st , alone.

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As Spring Weather Stabilizes in NC, Look out for ABW

Following a long, cold March, the weather has seemed to stabilize and is finally consistent with average April temperatures in North Carolina. Last week, adult numbers approached the threshold for making an adulticide application at both NC sites.

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Its “Go Time” for Western Pennsylvania; Further scouting for the central region

Significant adult movement was detected in Pittsburgh last Monday (April 10th). The most amount of adults were collected from edges of fairways, but substantial numbers were still found immediately adjacent to overwintering sites. The warm temperatures during the week (especially over Easter weekend) make it time to consider applying an adulticide for the Pittsburgh area. Ideally, these applications will be made early in the week.

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Stage Notifications on the Way

As we move out of the stop and go temperatures of early spring, many sites will be seeing annual bluegrass weevil (ABW) activity increase and will be advancing to Scout for Stage 1 or Stage 1 of WeevilTrak™ shortly, if they haven't already. In anticipation of these changes, I want to briefly describe the differences in the notifications WeevilTrak subscribers will see in your inbox.

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