WeevilTrak Blog | GreenCast | Syngenta
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: Dr. Ben McGraw

Weevil Trak Blog for May 13th, 2020: Stuck in first (instar) gear

We have been experiencing an extremely cold stretch of weather in Pennsylvania and Ohio over the last couple of weeks, including two days where we woke up to snow on the ground in State College.

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WeevilTrak Blog for April 7, 2020: Holding Pattern

The growing degree day (GDD) accumulations in March had Pennsylvania and Ohio tracking for a very early start to the annual bluegrass weevil (ABW) control season.

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WeevilTrak update March 19, 2020

I have received several calls over the last week from superintendents asking if there is any control measure that can be put in place now that would control ABW adults for a couple of weeks should they be required to leave the golf course due to Coronavirus quarantining. It's important to stay safe and be smart about things. The global pandemic has put a strain on current operations, but I know that many want to ensure that ABW is controlled before having to evacuate should it be made mandatory or required by ownership.

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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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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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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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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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Almost there for western Pennsylvania

The warm weather from April 8 – April 14 approximately doubled the previously accumulated growing degree days (GDDs) at all three of our WeevilTrak sites. Temperatures look good in these areas for the next seven days, so now is a great time to do some scouting, but exercise some patience with insecticide sprays.

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2019 WeevilTrak Season in Pennsylvania

The Penn State Turfgrass Entomology Lab will be monitoring the same WeevilTrak courses this year as we did last year: Westfield Country Club in northeastern Ohio, Fox Chapel Country Club in Pittsburgh (western Pennsylvania ), and the Country Club of Harrisburg in Harrisburg (central Pennsylvania). These courses are a nice representation of the diversity we see in our region in terms of population density, number of years battling annual bluegrass weevil (ABW), and when damage is most prevalent.

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Hot and dry in Pennsylvania; ABW in Kentucky

We are entering a period when we typically start to observe 2nd generation larval feeding damage in the Pennslyvania. Turf is incredibly stressed right now, and any marginal control earlier in the month could become apparent now. We've also seen new developments of ABW damage in Kentucky.

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