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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

Worst Golf Course Insect Pest in the Northeast

Which is the worst golf course insect pest in the Northeast? The answer to that may seem obvious to most people reading this WeevilTrak Blog: annual bluegrass weevil (ABW). Right? The answer, however, is: insecticide-resistant ABW. Anybody lucky enough to still be dealing with insecticide-susceptible ABW populations should keep this in mind: Don't get them angry. Insecticide-resistant ABW are a nightmare. And insecticide-resistant ABW are generally created locally by insecticide overuse and poor insecticide resistance management.

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Here We Go Again

With a relatively mild winter, smattered with a few cold streaks and the unseasonably warm trend we've experienced through March thus far, a lot of folks are already gearing up for an early crawl.

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Start Scouting, Not Treating

It may have felt like spring, or even summer this week in most locations of the Mid-Atlantic and Northeast regions, however the calendar tells us that spring will not be here until March 20. This week I traveled throughout Virginia, Maryland, New Jersey and Pennsylvania visiting courses and many times felt "too warm for March". The week of March 6 through 13 was marked by warm days and moderate nighttime temperatures. We use growing degree days (GDD) as one of many tools to monitor annual bluegrass weevil (ABW) activity.

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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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Most effective way to manage annual bluegrass weevil: Reduce Poa annua wherever possible, as much as possible

After a season talking about insecticides and insecticide resistance, we should not forget one thing: The most sensible and effective way to deal with annual bluegrass weevil (ABW) is using and promoting grasses that are resistant and/or more tolerant of ABW larval feeding. And this is why:

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Creeping Bentgrass Damage by the Annual Bluegrass Weevil in Mid-Summer

Over the past three weeks, in the Mid-Atlantic region, we have experienced a significant amount of evapotranspiration and very little rainfall. Most golf courses are relying heavily on their irrigation systems to replace the water loss. Besides dry conditions, I have observed more and more damage from the annual bluegrass weevil (ABW) to 100 percent creeping bentgrass.

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Overlapping of Life Cycles with Heat and Moisture Stress is Upon Us

June brought a lot of rainfall for the Mid-Atlantic region. There were a number of golf courses in the Washington, D.C., Baltimore and Philadelphia corridor that recorded more than 12 inches of rainfall from June 2 through July 15, with some as high as 18 inches.

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Change of direction in resistant ABW management?

You might remember that this past spring we were testing the standard adulticides and larvicides on four golf courses with pyrethroid resistance levels of about 2x, 30x, 100x and 300x compared to our most susceptible population at the Rutgers Hortfarm II.

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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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First Generation of ABW Coming to an End and Research Results Are In

Currently, throughout Maryland, Pennsylvania and South New Jersey we are observing an increase in mature and callow adult activity on the turf surface. Through soap flushing, I saw pairs of mating adults last week in a number of locations.

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