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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

2019 ABW season summary and 2020 outlook

The recent little heat wave combined with relatively dry conditions may have brought out some trouble with annual bluegrass weevil larvae in some areas. However, the current cooler conditions combined with some irrigation could alleviate any such problems.

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ABW activity in Virginia Aug. 13 Update

As of the first two weeks of August, we are seeing an increase in adult annual bluegrass weevil (ABW) population levels at the three Virginia golf courses sampled.

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Summer damage and Stage 6

Turfgrass insect pest issues – including annual bluegrass weevil - are traditionally pretty light in the northeast during July and August. However, we have seen an increase in the amount of phone calls/therapy sessions and site visits related to ABW populations damaging turf in mid-to-late summer over the last two seasons.

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If scouting reveals high ABW larval densities, time for larvicides to control the first summer generation of ABW

In central and northern New Jersey, scouting for larvae of the first annual bluegrass weevil summer generation should have already started and any necessary larvicide applications are impending. ABW populations currently consist of all stages from spring generation adults through large larvae of the first summer generation.

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July 11 update ABW Activity in Virginia

As of the first week of July, annual bluegrass weevil populations were predominately in the large larvae, pupae, and new adult stages at two of the three Virginia golf courses sampled.

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Ding! Ding! Round Two

In my visits to golf courses, populations of annual bluegrass weevils are asynchronous and have been since early June. Warmer temperatures speed up insect development and decrease the turf’s tolerance to feeding from insect pests.

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Keep on holding off….for now

Currently, we are in a holding pattern in central Pennsylvania with a larvicide application. We are still seeing the occasional fourth and fifth instars, pupae from the first generation in our untreated fairways at the Country Club of Harrisburg. The most abundant stage we are seeing are newly-formed first generation adults

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June 18 ABW update from Virginia

Adult annual bluegrass weevil activity increased significantly over the past two weeks on greens and in soap flushes at two of the three Virginia golf courses sampled. Dr. Tom Kuhar provides an update.

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1st generation complete?

The first generation is coming to a close in most parts of central and western Pennsylvania and northeast Ohio. Although many courses have reported seeing a significant amount of larvae still present despite much of the populations in these areas advancing into or beyond pupae and teneral adults.

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In central and northern New Jersey ABW Spring generation close to complete

In central and northern New Jersey, it is about time to start scouting for the adults of the annual bluegrass weevil (ABW) spring generation. Populations are primarily around the pupal stage right now, but an increasing number of new still reddish adults are starting to show up.

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