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Biological Control of the Annual Bluegrass Weevil in New Jersey

Biological Control of the Annual Bluegrass Weevil in New Jersey. B. A. McGraw and A. Koppenh ö fer. Listronotus maculicollis. Single most destructive insect pest on golf course turfgrass in the NE, U.S. Primarily feeds on annual bluegrass, a prevalent grass weed on golf courses

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Biological Control of the Annual Bluegrass Weevil in New Jersey

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  1. Biological Control of the Annual Bluegrass Weevil in New Jersey B. A. McGraw and A. Koppenhöfer

  2. Listronotus maculicollis • Single most destructive insect pest on golf course turfgrass in the NE, U.S. • Primarily feeds on annual bluegrass, a prevalent grass weed on golf courses • Managed preventatively with pyrethroids

  3. ABW Development Vittum et al. 1999 Cameron and Johnson, 1971

  4. Annual BluegrassPoa annua • Highly invasive grass weed found cool-temperate regions • Performs well under close mowing • Performs poorly in heat/drought stress

  5. ABW Damage

  6. New Jersey Surveyfor Infected ABW

  7. Infection of ABW by endemic EPNs Early-stage infections in ABW larva and late stage infection in pupa. Late-stage infection by endemic nematodes in ABW larva.

  8. Entomopathogenic nematode life cycle

  9. Survey for natural pathogens of ABW in NJ EPN in Soil: 34% H. bacteriophora, 66% S. carpocapsae ABW infections: 98% H. bacteriophora, 2% S. carpocapsae

  10. Seasonal Dynamics

  11. Seasonal dynamics of ABW and infections by endemic EPN in GC fairways Pine Brook GC, Manalapan, NJ

  12. Future Research • Conduct laboratory assays against various lifestages of ABW, EPNs and environmental variables • Conduct field trials with promising EPNs • Monitor the impact of ABW on P. annua and overseeding on the turfgrass species

  13. Acknowledgements: • Technical support: E. Fuzy, M. Resnick and Z. Eagan • Funding: GCSAA, USGA and Rutgers Center for Turfgrass Science

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