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If you are planning to apply an adulticide to manage the adults of the ABW spring generation, it is time to start scouting for them.
We are monitoring ABW pyrethroid susceptibility in Virginia to help guide superintendents on making confident insecticide choices for ABW adults this year.
The first reports of ABW adult damage in Kentucky came in late May.
ABW pressure is higher than in previous years in the Mid-Atlantic. Continue scouting for emerging adults.
As May draws to a close, we are likely seeing the new first generation of ABW adults active on golf courses.
It is expected that ABW immatures will pupate and adults will emerge within the next two weeks
The detection of first instar larvae signals the onset of Stage 3 in ABW development. Early detection is critical for the timely management and prevention of turf injury.
As early ABW damage appears in central and southern Ohio, curative larvicides should be applied as needed before damage becomes exacerbated.
Rain, wind and numerous severe weather events provided only small windows of time for applications.
Larval activity has increased at most NC WeevilTrak sites.
I started to see large ABW damage from larvae and even some pupae in Virginia and Maryland last week.
Based on the indicator plants and the larval stage average, it is now time to apply larvicides against the mid-size larvae that have started to exit the plants.
It is too late for adulticides in New England. Instead, the focus should be on management of larvae feeding inside of the stem.
Our scouting indicates that this week marks a critical window for ABW management across the central Pennsylvania and central Ohio regions.
A substantial increase in adult ABW activity has been observed in early May alongside phenological markers of early spring development.
With the first spotting of early instar immature ABW, now is the time to revisit the plan of attack for ABW management.
An asynchrony between ABW population development and plant phenology/GDD has been noticed this spring, making optimal adulticide application timings challenging.
This week and next week are the times to apply adulticides and/or prepare for larval monitoring.
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