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1 October 2008 Pellet Formulations of Sex Pheromone Components for Mating Disruption of Oriental Beetle (Coleoptera: Scarabaeidae) in Turfgrass
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Wax-based pelleted sex pheromone formulations were tested for efficacy in managing oriental beetle, Anomala orientalis Waterhouse, in turfgrass. Four pellet formulations were field tested at 25 g pheromone/ha during 2006 and 2007. Application patterns included pellets specifically placed in a uniform grid pattern and pellets scattered by a broadcast spreader. Treatment efficacy was measured by monitoring male A. orientalis captures in pheromone-baited traps, determining mating success of confined virgin females, and estimating subsequent densities of A. orientalis larvae in soil/sod samples. All formulation and application pattern combinations effectively suppressed mating for 2 wk after application as measured by reduction in male trap captures and mating success of confined virgins. Two formulations gradually lost efficacy beginning 2 wk after application and the two others after 3–4 wk. Application pattern had no effect on trap captures. The most effective formulation reduced trap captures by ≥90% for 36 d, reduced mating success of confined females by 86–100% until 24 d after treatment, and reduced A. orientalis larval populations by 69%. In a previous study, sprayable formulations resulted in nuisance contamination of shoes that attracted male beetles outside of pheromone-treated areas. In contrast, shoes walked through pellet-treated areas did not attract male beetles. Pellet formulations have great potential for A. orientalis mating disruption, but more research is needed to optimize performance.

Albrecht M. Koppenhöfer, Robert W. Behle, Christopher A. Dunlap, Joan Fisher, Carol Laird, and Patricia J. Vittum "Pellet Formulations of Sex Pheromone Components for Mating Disruption of Oriental Beetle (Coleoptera: Scarabaeidae) in Turfgrass," Environmental Entomology 37(5), 1126-1135, (1 October 2008).[1126:PFOSPC]2.0.CO;2
Received: 21 January 2008; Accepted: 9 June 2008; Published: 1 October 2008

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