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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

First thoughts after a crazy ABW spring season in New Jersey

After the busiest annual bluegrass weevil (ABW) spring season ever combined with crazy spring weather that made predicting populations rather challenging, I finally have a little time to summarize.

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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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Larvae on the move in New England

We have been processing the samples from one of our field trials this week, and have noticed some things that are a little unusual relative to annual bluegrass weevil larval activity. Normally, we see much more activity from larvae feeding along the edge of a fairway in the spring. But this year in one of our trials, we found significantly more larvae in an untreated plot that was 25 feet into the fairway from the rough.

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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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Buckle your seat belts, here we go!

Samples sent to us this week from around southern New England have confirmed that ABW larvae are finally hatching and becoming active. After several weeks of seeing only an occasional second instar, this week we saw lots of third instars and even a few fourth instars.

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Heavy rain slows ABW damage – for now

My Memorial Day Picnic was cancelled because of heavy rainfall along the beaches of Delaware. So, just like last month, I'm writing this blog during a rainfall event when we really don't need this much rain.

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Wavering Weevils

If you have been following the WeevilTrak blog, you know that fluctuating temperatures have made this a strange year for annual bluegrass weevil (ABW) life stage timings, not just in North Carolina, but everywhere.

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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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Update from New Jersey

Just like last year, it has been a crazy busy spring ABW season with 23 experiments on six golf courses (including the usual synthetic insecticide protocols). These were experiments with various biorational and biological insecticides and testing the standard adulticides and larvicides on four golf courses.

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Temperature Comparisons in Southern New England

One of the WeevilTrak sites we are monitoring is a charter member of the program, so we have eight years of data from Tumble Brook Country Club in Bloomfield, CT (just northwest of Hartford). The superintendent, Cindy Johnson, has been a loyal WeevilTrak supporter.I just tabulated the accumulated degree day data for April and May for each of the past eight years at Tumble Brook.

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