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1 June 2003 Effects of Methoxyfenozide-treated Surfaces on the Attractiveness and Responsiveness of Adult Codling Moth (Lepidoptera: Tortricidae)
Jennifer A. Hoelscher, Bruce A. Barrett
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The attractiveness and responsiveness of adult codling moth, Cydia pomonella (L.), exposed to surfaces treated with the ecdysteroid agonist methoxyfenozide was investigated in wind tunnel and orientation tube assays. When males were exposed to either water- or surfactant-treated surfaces for 48 h, and regardless of what treatment surfaces the females had been exposed to, the mean percent recaptures of such treated males in the wind tunnel assay were sometimes significantly greater than the recaptures of males that had been exposed to methoxyfenozide. Similarly, in the orientation tube assay, males exposed to methoxyfenozide-treated surfaces almost always had significantly lower mean levels of individuals exhibiting sexual excitability and the mean distances traveled upwind, regardless of female exposures. The two assays demonstrated that male codling moths exposed to methoxyfenozide-treated surfaces were not as responsive to calling females (treated and nontreated) as were the nontreated males. Conversely, females exposed to methoxyfenozide-treated surfaces were just as attractive to nontreated males as were nontreated females. It appears that a male’s ability to respond to a calling female is more negatively affected by the ecdysone agonist than a female’s ability to call and attract males.

Jennifer A. Hoelscher and Bruce A. Barrett "Effects of Methoxyfenozide-treated Surfaces on the Attractiveness and Responsiveness of Adult Codling Moth (Lepidoptera: Tortricidae)," Journal of Economic Entomology 96(3), 623-628, (1 June 2003).
Received: 30 September 2002; Accepted: 1 December 2002; Published: 1 June 2003

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Cydia pomonella
orientation tube
sex pheromone
wind tunnel
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