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 August 17: It Depends

All of the sites in our region were advanced into “Scout for Stage 6.” The next couple of days people called me to ask what they should be applying and when. My response at this time of the year is “it depends.”

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Is it Weevil damage?

It has continued to be a relatively quiet annual bluegrass weevil (ABW) summer. But I received several calls earlier in the month from superintendents who suspected that they had some breakthroughs on tees and collars. It's critical at this time of the year to determine whether chlorosis or the early onset of a potential problem is due to insect feeding or something else.

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No matter the pressure, stay vigilant

It has been some time since my last blog, which usually means lots of things have been happening in the lab and field. Although our lab has been extremely busy with research and evaluating insecticide trials, it has been extremely quiet as far as ABW activity.

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Its finally heating up!

Annual bluegrass weevil activity from Ohio to central Pennsylvania has been relatively low this spring, but adults have been active and early instar larval populations are beginning to peak at most locations.

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WeevilTrak Update: April 18

We have added a new WeevilTrak site in the Columbus, Ohio area. The Golf Club in New Albany, Ohio is a late entry to the WeevilTrak season. This was added as adult activity and plant phenology would indicate that it is ahead of both Westfield Country Club in northeast Ohio and Pittsburgh.

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A Most Unusual Start

Growing degree days from northeast Ohio to central Pennsylvania have substantially increased in last seven days. Strange things are happening in terms of the accumulated GDDs relative to weevil movement and plant development.

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WeevilTrak Update March 22, 2021

Nothing signals the start of the annual bluegrass weevil season more than sitting down to write the opening WeevilTrak blog. This year is looking as though it will have an early start as temperatures during the week of March 22 should force some of the first wave of adults out of overwintering.

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WeevilTrak Update for August 11, 2020

I was just telling a superintendent the other day that 2020 has been the quietest annual bluegrass weevil year that I can remember. However, the last 10 to 14 days have produced the most S.O.S. calls of the year, and probably more insecticide applications out of desperation.

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WeevilTrak Blog for July 2020

We have had nothing but intense heat and no rainfall since my last blog entry and some reports of weevil damage have come in. Several superintendents in our region shared images of large larvae in late June.

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June 25 WeevilTrak Update

ABW developing is moving along in central Pennsylvania to northeast Ohio.

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