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It’s Wet! And Bentgrass Damage Observations

Much of the Mid-Atlantic region has received plenty of rainfall the past five weeks. I am hearing yearly totals in the Philadelphia area above 22-25 inches for the year. This has been another year to assess drainage concerns on the golf course. While frequent rainfall takes pressure off of hand hose work, other stressors come to the forefront. These include: mechanical stress associated with being wet, LABOR, drainage, storm and debris clean up and traffic management.

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Fewer Weevils in North Carolina... For Now

If you have been keeping up with WeevilTrak blog posts from my colleagues, you may notice that, in the last few weeks, the general consensus is that weevil numbers and damage appears to be lower this year than in previous years. This is true both for the northeastern US and in North Carolina.

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Watch out for summer generation ABW larvae in central and northern NJ

In central and northern NJ, larvae of the 1st summer generation are developing and could start causing problems if they reach high enough densities. Obviously, under hot summer conditions, with other stress factors involved, it takes fewer larvae to cause problems than in the spring. Hence, in areas that were not effectively treated in spring and/or that have a history of ABW problems in summer, regular monitoring for larvae should be conducted now. At this time, ABW may occur in all possible stages

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Summer ’17 ABW report

My observations of the summer of 2017 very closely mirror those of my colleagues. In general, weevil damage in southern New England seems to be lower than we have seen in recent years. Samples received last week from our site in Bloomfield, Connecticut revealed very low counts at all locations except one.

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Second generation larval damage on the way?

If I were to rank this season among previous ABW seasons, I would say that this has been one of the easier years. I have really struggled to find weevils on many of our research sites (including in untreated check areas). I think that this is because turf managers have done an excellent job when it has mattered most: spring.

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Where are all of the Weevils?

The past month has been fairly slow for ABW activity. I have had more conversations with superintendents that are just not seeing the populations of adults that they are accustomed to seeing in the middle of the summer. I don't have an explanation as to why exactly that is. Sometimes I think I have a good understanding of this insect when scouting and making suggestions, and then WOW, think again, some damage shows up.

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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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About this Blog

Welcome to the WeevilTrak™ blog, offering you timely field updates about annual bluegrass weevil (ABW) activity and control. Syngenta understands the key to successful control of ABW is through partnering with industry researchers and experts to recommend the best products at the right time for season-long results. This blog will provide you up-to-date activity of weevils and provide timely advice on how to help control them using the Optimum Control Strategy. Subscribe to industry researchers to receive updates from these authors in your inbox.

Recommendations are based on observatons from field researchers and may differ based on geography. Always apply product based on your local conditions.

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