Pheromone components and diel periodicity of pheromonal communication in Lymantria fumida
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| Authors: | Schaefer, PW; Gries, G; Gries, R; Holden, D |
| Year: | 1999 |
| Journal: | Journal of Chemical Ecology 25: 2305-2312 |
| Title: | Pheromone components and diel periodicity of pheromonal communication in Lymantria fumida |
| Abstract: | Extracts of pheromone glands from female Lymanitria furnida were analyzed by coupled gas chromatographic-electroantennographic detection (GC-EAD) and by coupled GC-mass spectrometry (MS). The two compounds that elicited responses from male L. furnida antennae were identified as cis-7,8-epoxy-2-methyloctadecane (disparlure) and 2-methyl-Z7-octadecene (2me-Z7-18Hy). Field experiments in northern Japan demonstrated that synthetic (7R,8S)-cis-7,8-epoxy-2-methyloctadecane [(+)-disparlure] and 2me- Z7-18Hy are synergistic sex pheromone components of L. fumida. (7S,8R)cis-7,8-Epoxy-2-methyloctadecane [(-)-disparlure] had no behavioral effect on male L. fumida. Traps baited with (+)-disparlure and 2me-Z7-18Hy captured male L. fumida between 21:00 and 24:00 hr, whereas traps baited with (+)-monachalure [(7R,8S)-cis-7,8-epoxy-octadecane],(+)-disparlure and 2me-Z7-18Hy attracted males of the nun moth, L. monacha L., between 02:00 and 04:00 hr. Both temporal separation of pheromonal communication and specificity of pheromone blends seem to contribute to the reproductive isolation of sympatric and coseasonal L. fumida and L. monacha. |
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