Monday, December 11, 2006 - 11:11 AM

Variation in population parameters of the annual bluegrass weevil, Listronotus maculicollis (Coleoptera: Curculionidae), with respect to golf course habitats

Masanori Seto,, Maria D. Diaz,, and Daniel C. Peck, Cornell University, Department of Entomology, New York State Agricultural Experiment Station, 630 West North Street, Geneva, NY

The influence of habitat on the population dynamics of the annual bluegrass weevil in golf courses was studied over three seasons (2004-2006). Larval and adult populations were monitored weekly along three transects across a fairway and bordering rough at two representative golf courses in upstate NY. Survey data were analyzed to measure and compare various parameters across the fairway and rough habitats including insect abundance, adult sex ratio, seasonal fluctuation curves, number of generations, phenology, generation time, and prediction with degree day and Julian date models. Among the initial results gleaned over two years, abundance was 2.8-17.0 fold higher in the fairway versus rough, and sex ratio shifted from 1:1 in the fairway to 1.6-2.3:1 in the rough. A complete analysis of data collected over three consecutive years will establish the pattern of habitat exploitation and set the stage for explaining why annual bluegrass weevil damage is most prevalent on the edge of short-mowed turf.

Species 1: Coleoptera Curculionidae Listronotus maculicollis (annual bluegrass weevil)

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