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2005 Turf Insect Summary

Learn about the biology and control strategies for Annual Bluegrass Weevil (ABW) and White Grubs affecting turfgrass in New Hampshire. Understand their feeding habits, preferred conditions, and effective control methods for optimum turf health.

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2005 Turf Insect Summary

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  1. 2005 Turf Insect Summary New Hampshire Stan Swier

  2. Biology of ABW • Feeds mostly on annual bluegrass (Poaannua • Prefers Poa cut at <0.5 in (greens, tees, fairways • Larvae initially feed in leaf blade but eventually move to crown • Pupations occurs below crown in soil • 2 generations/yr, sometimes 3

  3. ABW Control- 2005 • Due to very long oviposition period, many sites required 2 or more preventative pyrethroid applications for good control • Mixed life stages – confused superintendents • Yellow Poa – assumed to be cold related • Common error-premature applications • Curative controls consisted of Merit, Dylox and Dursban, 1-4 applications • Pyrethroid resistance observed (CT) – more treatments will be made

  4. White Grubs • Wet, cold spring- JB emergence delayed 12 days – fooled superintendents, fall damage severe • Wettest October on record – pyrethroids gave unusually good curative control of JB

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