Abstract
(Z)-10-Tetradecenyl acetate (Z10-14:OAc) from abdominal tip extracts of virgin females of the tentiform leafminer moth Phyllonorycter ulmifoliella (Lepidoptera: Gracillariidae) was identified by gas chromatography and mass spectrometry. The biological activity of the component was confirmed by field tests with synthetic compounds. As a sex pheromone component this ester is novel both in the family Gracillariidae and in the superfamily Gracillarioidea. Field trapping of P. ulmifoliella with synthetic Z10-14: OAc at dosages of 1 and 0.2 mg/dispenser led to catches of approximately 9000 and 3000 male moths, respectively. The attractivity of the Z10-14:OAc was strongly inhibited by a 10% admixture of either (Z)-9-tetradecenyl acetate (Z9-14:OAc), (E)-9-tetradecenyl acetate (E9-14:OAc), or (E)-11-tetradecenyl acetate (E11-14:OAc). Addition of 10% (E)-10-tetradecenyl acetate (E10-14:OAc) to the sex pheromone reduced attractivity, but significantly less than the inhibitors previously mentioned. The pheromone releasing (or “calling”) behavior of virgin P. ulmifoliella females was recorded under laboratory conditions. Calling activity started about half an hour before lightson and the maximum number of calling females was registered half an hour after the start of photophase. A high level of pheromone releasing activity lasted for about 2 hr and ceased about 5 hr after the start of photophase. Chemocommunication activity in the light period of day is assumed to be an adaptation which allows this phyllonoryctid to avoid inhibitors emitted as pheromones by many other species. A scheme of probable interactions by means of semiochemicals between P. ulmifoliella and other lepidopterans is presented and the appearance of Z10-14: OAc as a sex pheromone component in Lepidoptera during evolution of the order is discussed.
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Mozūraitis, R., Būda, V., Borg-Karlson, AK. et al. Chemocommunication in Phyllonorycter ulmifoliella (HBN.) (Lepidoptera: Gracillariidae): Periodicity, Sex Pheromone, and Inhibitors. J Chem Ecol 23, 175–189 (1997). https://doi.org/10.1023/B:JOEC.0000006353.51462.37
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DOI: https://doi.org/10.1023/B:JOEC.0000006353.51462.37