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1 June 2009 Evaluation of Pheromone-Based Management Strategies for Dogwood Borer (Lepidoptera: Sesiidae) in Commercial Apple Orchards
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The dogwood borer, Synanthedon scitula (Harris) (Lepidoptera: Sesiidae), is a serious wood-boring pest of apple in eastern North America. The recent identification of its sex pheromone and systematic documentation of the effect of a potent behavioral antagonist affords the opportunity to develop pheromone-based management strategies for this important pest. Here we evaluated the potential of pheromone-based mass trapping of males to reduce dogwood borer infestations and conducted preliminary evaluations of an antagonist-based pheromone blend for disruption of dogwood borer mate finding in commercial apple orchards in North Carolina, Virginia, and West Virginia. In the mass trapping study, treatments included a conventional trunk-drench application of chlorpyrifos, a low-density mass trapping regime of 5 traps/ha, a higher-density mass trapping regime of 20 traps/ha, and an untreated control. We removed large numbers of males from orchards at all locations, with 27,155, 8,418, and 7,281 removed from high-density trapping plots in North Carolina, Virginia, and West Virginia, respectively, over 2 yr. After 2 yr under each of these treatment regimes, infestation in high- and low-density mass trapping plots was not reduced to the level of chlorpyrifos-treated plots. An antagonist-based dispenser deployed at a rate of 250/ha effectively disrupted mate-finding by male dogwood borer. In plots with mating disruption dispensers, captures in pheromone-baited traps were virtually eliminated, and no males were captured in traps baited with virgin females.

Tracy C. Leskey, J. Christopher Bergh, James F. Walgenbach, and Aijun Zhang "Evaluation of Pheromone-Based Management Strategies for Dogwood Borer (Lepidoptera: Sesiidae) in Commercial Apple Orchards," Journal of Economic Entomology 102(3), 1085-1093, (1 June 2009).
Received: 29 April 2008; Accepted: 1 December 2008; Published: 1 June 2009

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