Oriental fruit moth pheromone component emission rates measured after collection by glass-surface adsorption |
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Authors: | Thomas C Baker Ring T Cardé James R Miller |
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Affiliation: | (1) Department of Entomology and Pesticide Research Center, Michigan State University, 48824 East Lansing, Michigan;(2) Present address: Department of Entomology, Division of Toxicology and Physiology, University of California, 92521 Riverside, California |
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Abstract: | We collected and quantified both synthetic and natural Oriental fruit moth Grapholitha molesta (Busck)] sex pheromone components in 250-ml round-bottom flasks by hexane rinsing of compounds adsorbed on the glass walls. This simple procedure collected 100% of the pheromone evaporated inside the flask and was useful for quantifying both nanogram and microgram amounts of emitted pheromone. Emission rates of (Z)-8-dodecenyl acetate from 1000, 100, and 10 g-loaded rubber septa were 219, 12, and 1.2 ng/hr, respectively.G. molesta females emitted this component at 3.2 ng/hr, close to the emission rate from a 10 g-loaded septum, which evokes long-range and close-range behaviors in the male. The corresponding alcohol, (Z)-8-dodecenyl alcohol, was emitted from rubber septa ca. 3 times faster than the acetate.Lepidoptera: Tortricidae.Paper of the Michigan State Agricultural Experiment Station. |
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Keywords: | Oriental fruit moth Grapholitha molesta pheromone release rate airborne collection (Z)-8-dodecenyl acetate (Z)-8-dodecenyl alcohol |
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