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Now Showing: Posts by Dr. Albrecht Koppenhöfer 74 Posts

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2017 ABW season summary and 2018 outlookAugust 30, 2017

For most golf courses, the annual bluegrass weevil (ABW) season should be pretty much over. In fact, at the two courses I have monitored for WeevilTrak...

Watch out for summer generation ABW larvae in central and northern NJAugust 2, 2017

In central and northern NJ, larvae of the 1st summer generation are developing and could start causing problems if they reach high enough densities. ...

ABW spring generation close to complete in central and northern NJJune 20, 2017

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...

Start getting ready for curative ABW larvicides in central NJ, not quite there, yet, in northern NJMay 12, 2017

This week I have two very different scenarios to offer, and I am scratching my head over it. In central New Jersey at Pine Brook Golf Course, adult densities...

Time for early ABW larvicides in central NJ, getting there in northern NJMay 4, 2017

While adult ABW densities stay high, small larvae have started to show up on fairways in central and northern NJ. In fact, at both Pine Brook Golf Course...

Get ready for adult ABW treatments in central NJ, a little later in northern NJApril 13, 2017

In central New Jersey the adult weevil may be approaching peak densities. At Pine Brook Golf Course (Manalapan, NJ) on Wednesday, April 12, I vacuumed...

“The Incredible Hulk”: ABW monitoring and the weatherMarch 27, 2017

Ever ridden "The Incredible Hulk" at Universal Studios in Orlando? I just did. It's not particularly high and starts out with a 45° climb that seems...

Biological and biorational control options for ABW for resistance managementAugust 15, 2016

Given the severity of insecticide resistance issues with ABW and the limited number of synthetic insecticides that still work against resistant, especially...

For resistant ABW (or any ABW): consider switching to larvae as the main, or only, targetAugust 1, 2016

Many people will argue that using adulticides is still necessary to at least reduce the spread of the larval stages. However, what about adulticides against...

First thoughts after a crazy ABW spring season in New JerseyJune 27, 2016

After the busiest annual bluegrass weevil (ABW) spring season ever combined with crazy spring weather that made predicting populations rather challenging...

Update from New JerseyMay 20, 2016

Just like last year, it has been a crazy busy spring ABW season with 23 experiments on six golf courses (including the usual synthetic insecticide protocols...

Get ready for ABW larvicide applications soonApril 28, 2016

Around New Jersey, most golf courses with adult bluegrass weevils (ABW) issues have probably by now applied ABW adulticides to control the overwintered...

Worst Golf Course Insect Pest in the NortheastMarch 17, 2016

Which is the worst golf course insect pest in the Northeast? The answer to that may seem obvious to most people reading this WeevilTrak Blog: annual bluegrass...

Most effective way to manage annual bluegrass weevil: Reduce Poa annua wherever possible, as much as possibleAugust 31, 2015

After a season talking about insecticides and insecticide resistance, we should not forget one thing: The most sensible and effective way to deal with...

Change of direction in resistant ABW management?July 31, 2015

You might remember that this past spring we were testing the standard adulticides and larvicides on four golf courses with pyrethroid resistance levels...

Ference: The Real Deal?!June 8, 2015

First, an update on my five annual bluegrass weevil (ABW) monitoring sites for last week-Tuesday, June 1 and Wednesday, June 2.

ABW update from New JerseyMay 22, 2015

It has been a busy spring ABW season with 19 experiments on five golf courses. Meanwhile, all five populations I've been working with are ready for larvicide...

Insecticide resistance in ABW – Part TwoMarch 31, 2015

Based on my observations through our own studies and conversations with colleagues, USGA agronomists and superintendents estimate that any golf course...