Host-plant green-leaf volatiles synergize the synthetic sex pheromones of the corn earworm and codling moth (Lepidoptera) |
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Authors: | Douglas M Light Robert A Flath Ronald G Buttery Frank G Zalom Richard E Rice Joseph C Dickens Eric B Jang |
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Institution: | (1) Agricultural Research Service, U.S. Department of Agriculture, Western Regional Research Center, 94710 Albany, CA, USA;(2) Department of Entomology, University of California, 95616 Davis, CA, USA;(3) Agricultural Research Service, U.S. Department of Agriculture, Boll Weevil Research Laboratory, 39762 Mississippi State, MS, USA;(4) Agricultural Research Service, U.S. Department of Agriculture, Tropical Fruit and Vegetable Laboratory, 96720 Hilo, HI, USA |
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Abstract: | Summary The capture of adult male moths in female sex pheromone traps of two key agricultural pests, the corn earworm (Helicoverpa zea) and the codling moth (Cydia pomonella), is enhanced or synergized by a certain group of host-plant volatiles, the green-leaf volatiles (GLVs). Since female adults of both species call and release their sex pheromones while perched upon the leaves of their host-plants, the volatile constituents from the leaves of a number of host-plants were compared. Sex pheromone traps containing one of the prominent leaf volatiles of certainH. zea hosts, (Z)-3-hexenyl acetate, not only significantly increased the capture ofH. zea males but were preferred over traps baited only with sex pheromone. Similarly, traps baited with synthetic sex pheromome ofC. pomonella plus a blend of GLVs captured significantly more males than traps baited only with sex pheromone. Since male moths are not captured in traps baited only with these GLVs, it appears that these GLVs act as pheromone synergists which increase or enhance the attraction or arrestment of male moths in pheromone traps. |
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Keywords: | pheromone synergists host-plant volatiles Lepidoptera Noctuidae Helicoverpa zea corn earworm Olethreutidae Cydia pomonella codling moth |
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