Abstract
The lepidopteran genus Saturnia has three representatives in North America, S. walterorum, S. mendocino, and S. albofasciata. (E4,Z9)-Tetradecadienal (E4,Z9–14 : Ald) was identified as a sex pheromone component for all three species by combinations of coupled gas chromatography–electroantennogram detection (GC-EAD), GC–mass spectrometry (MS), and field trials. In field trials, all three species were strongly attracted to (E4,Z9–14 : Ald) as a single component. Small amounts of (Z)-9-tetradecenal (Z9–14 : Ald) also were found in extracts of all three species, but blends of this compound with E4,Z9–14 : Ald were no more attractive to male moths than E4,Z9–14 : Ald alone. Extracts of pheromone glands of female S. walterorum occasionally contained a third, trace compound eliciting responses from male antennae in GC-EAD experiments, but this compound was not identified. It is suggested that the three species can use the same, single component as a sex attractant because the flight period of S. albofasciata (fall) is different than that of the other two species (spring), whereas the geographic distributions of S. mendocino and S. walterorum overlap over only small portions of their ranges. Furthermore, the latter two species readily hybridize, so there may be minimal fitness cost to cross-attraction.
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Mcelfresh, J.S., Millar, J.G. & Rubinoff, D. (E4,Z9)-TETRADECADIENAL, A SEX PHEROMONE FOR THREE NORTH AMERICAN MOTH SPECIES IN THE GENUS Saturnia. J Chem Ecol 27, 791–806 (2001). https://doi.org/10.1023/A:1010310204552
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DOI: https://doi.org/10.1023/A:1010310204552