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. Tom Kuhar

Dwindling ABW populations in Blacksburg, Virginia – Signing off for the year

As we have seen dwindling adult numbers as well as no sign of new larvae as we head into late September, we will stop our WeevilTrak monitoring at this location in southwest Virginia.

Read More


Very little ABW activity occurring in Blacksburg, Virginia – Mid August

There was a spike of new ABW adults in the first week of August at Blacksburg Country Club, but this apparently did not lead to any significant larval populations.

Read More


Mostly adult activity occurring in Virginia – early July

As of July 1, 2021, we are seeing only moderate-to-low ABW densities and detecting mostly adults at Blacksburg Country Club, but reproduction is most certainly occurring.

Read More


Large larvae and new adults occurring in Virginia – early June

As of June 10, 2021, WeevilTrak annual bluegrass weevil (ABW) monitoring in Blacksburg and Charlottesville, Virginia is indicating a flush of new adults crawling over greens. A peak in 4th and 5th instars is also occurring based on the soil plugs. Damage from these large larvae is evident in some spots around the golf course.

Read More


New teneral ABW adults found in Blacksburg first week of May

Pulling turf plugs from the fairways at Blacksburg Country Club last week (May 5) revealed a reasonably high density of annual bluegrass weevil (ABW) larvae averaging around 40 to 50 per square foot (mix of small and large ones), and also produced our first teneral adult of the year. Has anyone found a teneral adult as early as May 5 before? We may have a record.

Read More


High ABW larval densities in Blacksburg, Virginia trigger first larvicide application

Blacksburg Country Club owed a large burst of ABW larvae last week and larvicide applications were made at this course this week.

Read More


First ABW larvae of the year found in Blacksburg, Virginia

After a period of fluctuating temperatures in the month of April in Virginia so far, the growing degree days have pretty much reached the threshold for peak annual bluegrass weevil adult activity throughout much of the state.

Read More


ABW activity subsided with a cold week but sampling is advised with the warm week ahead in Virginia – Stage 1

Despite a cold week to end the month of March, which slowed down any adult annual bluegrass weevil (ABW) activity in Virginia, the growing degree days have now exceeded 100 GDD since March 1 throughout Virginia. I’m guessing that there will be a lot of adult activity this week (April 5).

Read More


Early and alarming ABW activity seen in Virginia – Stage 1

Growing degree days may not have accumulated that much in Virginia, but other indications are suggesting that a first spray application to target ABW adults may be necessary in Virginia.

Read More


ABW tracking has commenced in Virginia – very little activity so far

As the week of March 6 has brought some warm weather to Virginia ABW have started to appear slowly.

Read More


© Syngenta. Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties and/or may have state-specific use requirements. Please check with your local extension service to ensure registration and proper use. Scimitar GC is a Restricted Use Pesticide. Acelepryn and Ference are Not for Sale, Sale Into, Distribution and/or Use in Nassau, Suffolk, Kings and Queens Counties of New York State unless permitted under FIFRA Section 24(c) Special Local Need Registration. The trademarks or service marks displayed or otherwise used herein are the property of a Syngenta Group Company or their respective third party owners.

(This site has attempted to provide the most accurate, timely information possible on this site. The descriptions, pictures and other representations of products and treatment recommendations on this micro-site may contain inaccuracies and errors. The site owner does not make any warranty or representation with respect to the accuracy or completeness of any such information, and all users of this site should consult their own specialists regarding application decisions and timing.)