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1 October 2013 Separating the Attractant from the Toxicant Improves Attract-and-Kill of Codling Moth (Lepidoptera: Tortricidae)
Juan Huang, Larry J. Gut, James R. Miller
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The behavior of codling moth, Cydia pomonella (L.), responding to three attract-and-kill devices was compared in flight tunnel experiments measuring attraction and duration of target contact. Placing a 7.6 by 12.6 cm card immediately upwind of a rubber septum releasing pheromone, dramatically increased the duration on the target to >60 s. In this setting, nearly all the males flew upwind, landed on the card first, and spent the majority of time searching the card. In contrast, male codling moths spent <15 s at the source if given the lure only. In a forced contact bioassay, knockdown rate or mortality of male codling moths increased in direct proportion to duration of contact on a λ-cyhalothrin-loaded filter paper. When this insecticide-treated paper was placed immediately upwind of the lure in the flight tunnel, >90% of males contacting the paper were knocked down 2 h after voluntary exposure. These findings suggest that past attempts to combine insecticide directly with sex pheromones into a small paste, gel, or other forms of dollops are ill-advised because moths are likely over-exposed to pheromone and vacate the target before obtaining a lethal dose of insecticide. It is better to minimize direct contact with the concentrated pheromone while enticing males to extensively search insecticide-treated surface nearby the lure.

© 2013 Entomological Society of America
Juan Huang, Larry J. Gut, and James R. Miller "Separating the Attractant from the Toxicant Improves Attract-and-Kill of Codling Moth (Lepidoptera: Tortricidae)," Journal of Economic Entomology 106(5), 2144-2150, (1 October 2013).
Received: 29 March 2013; Accepted: 11 July 2013; Published: 1 October 2013

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flight tunnel
insect behavior
lethal effect
sex pheromone
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