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Rhododendrons in full bloom throughout the Mid-Atlantic

Rhododendrons are in full bloom throughout the Mid-Atlantic region. This is a classic phenological indicator that larger (greater than third instar) larvae are active feeding and damage from annual bluegrass weevils will soon occur.

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Rhododendron approaching full bloom: scout for larvae and, if necessary, apply larvicides

In central and northern New Jersey, the annual bluegrass weevil populations are moving along. Larvae are now present up to the fourth stage in central New Jersey and up to the third stage in northern New Jersey.

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Ference considerations for Stage 3 applications in western and central Pennsylvania

Western and central Pennsylvania have passed Stage 2 and are rapidly approaching Stage 3. This stage is a pretty critical one and timing can vary based on population development differences between courses within a region.

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May 9 update - ABW activity in Virginia

A brief update on ABW activity in Virginia for the week of May 9.

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NC May WeevilTrak Update

It has been a relatively slow start to the ABW 2019 season so far in North Carolina. Although ABW adults became active in mid-March throughout the state, numbers have continued to remain well below threshold, likely due to rainfall and cooler temperatures. Let’s compare where we are currently to this time last year to help predict when to make the first application.

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To spray or not to spray?

Several superintendents have been asking one or the other of us whether it is time to apply an adulticide for the annual bluegrass weevil. Remember that we normally recommend that application to be made between Forsythia “half green – half gold” and dogwood full bloom. In other words, the HGHG stage is really the earliest you should consider applying an adulticide. Of course, part of the challenge is figuring out which Forsythia plant you should “believe”.

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Update on ABW activity in Virginia

Despite the warm weather at Blacksburg Country Club, annual bluegrass weevil adult activity has subsided a little.

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ABW activity in Virginia – April 20

The growing degree days at Blacksburg Country Club, Ballyhack near Roanoke, Virginia, and the Federal Club near Richmond increased last week. But despite warm weather, annual bluegrass weevil adult densities declined at all three sites.

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ABW adults building up in New Jersey. Prepare for adulticide applications if necessary.

The weevils are marching in, but at least at my two sites not in great numbers so far. I’m not sure if my populations are simply that low this year (I doubt that) or if the weevils are a bit confused by the rollercoaster weather.

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April Showers…bring May Weevils…

Throughout the Mid-Atlantic we have seen or are going to see peak movement of annual bluegrass weevil adults into fine turfgrass areas. In areas surrounding Washington D.C., golf courses likely peaked the week of April 15. In more northern points depending on the population at your course, ABW adults will likely peak the week of April 22.

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