Sex pheromone specificity as a reproductive isolating mechanism among the sibling speciesArchips argyrospilus andA. mortuanus and other sympatric tortricine moths (Lepidoptera: Tortricidae) |
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Authors: | R T Cardé A M Cardé A S Hill W L Roelofs |
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Affiliation: | (1) Department of Entomology, New York State Agricultural Experiment Station, 14456 Geneva, New York;(2) Present address: Department of Entomology, Michigan State University, 48824 East Lansing, Michigan |
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Abstract: | MaleArchips argyrospilus (Walker) were maximally attracted to a 60 40 4 200 admixture of (Z)-11-tetradecenyl, (E)-11-tetradecenyl, (Z)-9-tetradecenyl and dodecyl acetates. The identification of (Z)-9-tetradecenyl acetate, in addition to the other 3 components reported previously, is the first report of a 4-component pheromone system in moths.Archips mortuanus Kearfoot, a sibling species, was maximally attracted to a blend of the same components, but in a 90 10 1 mix of the tetradecenyl acetates. Among a number of tortricine moths that co-occur on apples and other hosts in New York, British Columbia, and elsewhere, differences in diel rhythms of attraction and seasonal distribution are insufficient to maintain reproductive isolation. Although the attractant systems of these species often possess components in common, males are maximally attracted to a speciesspecific blend. In tortricine moths attraction specificity appears to be a paramount mechanism for species partitioning. |
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Keywords: | Archips argyrospilus Archips mortuanus pheromone attractant Tortricidae (Z)-11-tetradecenyl acetate (E)-11-tetradecenyl acetate (Z)-9-tetradecenyl acetate dodecyl acetate |
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