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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

Mid-Atlantic Report: Shifting Focus

We've reached the point in the season in the mid-Atlantic when we tend to see more of the damage associated with annual bluegrass weevil larvae feeding shift from poa annua to creeping bentgrass.

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All quiet on the western front

The last week of May was a very busy time in North Carolina in terms of ABW management. At both northern and southern sites, adult and larval numbers increased to levels beyond what we observed in 2015 and 2016. Since then, ABW numbers at all sites have decreased and we have not seen much evidence either in terms of damage or soap flush counts in the last four weeks to indicate any increase in adult activity.

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June ABW Update for Southern New England

Many of the golf courses in southern New England are approaching the end of the first generation. Samples we received this week from our WeevilTrak sites were dominated by large larvae, prepupae and pupae. We even saw a few "callow" adults. This means the worst of the damage should be over for now for many of the superintendents in southern New England

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First Generation Weevil Update from Northern New England

It's June 21st and the first generation of ABW is over for many courses.Overall, those that followed the WeevilTrak program had good results controlling the overwintering adults and first generation larvae.

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ABW spring generation close to complete in central and northern NJ

In central New Jersey, annual bluegrass weevil (ABW) populations should be primarily in the pupa stage and/or the teneral (new, still reddish) adult stage. At Pine Brook golf club, I expect new adults to start to appear on the surface this week with spring generation adults likely to peak over the next two weeks.

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Is the worst over?

We are nearing the end of the 1st generation larvae in many locations between Ohio and central Pennsylvania. ABW damage was very apparent during the week of June 5th in our untreated turf areas at Bucknell University (central PA) and Fox Chapel (western PA). I was very concerned that damage would be exacerbated during this last week (June 12th) as temperatures hit the mid 90s for several days. However, this was not the case.

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First Round of Damage: Observations and What We Learned

Let me start this blog by saying that the annual bluegrass weevil continues to give us a roller coaster ride and not one year is the same. Currently in the Philadelphia and central to southern New Jersey areas we are starting to see the emergence of adults back into the turfgrass surface along with some lingering callow adults and pupae. Even if you had no damage from the over wintered adult cycle, continue to scout.

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Calm Before the Storm – Mid-Atlantic Update

As we lead into the unofficial start of summer here in the Mid-Atlantic, we are now having the occasional cool/cold day mixed in amongst predominately warmer days. As expected, that won't last long and we are set for a ramp up into the low-mid 90's over the weekend and into next week. After a fast start, what has been otherwise dragging out with regard to ABW development will likely be put into high gear next week.

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May ABW Update: PA and Southern NJ

We started to find consistent densities of annual bluegrass weevil (ABW) larvae in untreated check plots throughout Southeastern Pennsylvania and Southern New Jersey early in the week of May 15th. Visual ABW damage has been slowed by adequate soil moisture in most locations of the Mid-Atlantic region. All of the damage I have observed, to date this year, has been on annual bluegrass.

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ABW Development Update: North Carolina

Although the weather has continued to throw us for a loop, particularly in northern North Carolina, temperatures have consistently stayed in the 60s or higher the last few weeks. Despite the occasional snow flurry, soil temperatures remain in the 60s, which is the most important temperature for weevil development and activity. As a result, bizarre fluctuations in weather have not had too much of an impact on weevil populations.

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