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- Title
Sex Pheromone Components of Indian Gypsy Moth, Lymantria obfuscata.
- Authors
Regine Gries; Paul Schaefer; Roger Hahn; Grigori Khaskin; Gujjandadu Ramaseshiah; Balbir Singh; Gagandeep Hehar; Gerhard Gries
- Abstract
Abstract  The Indian gypsy moth, Lymantria obfuscata (Lepidoptera: Lymantriidae), has been recognized as a distinct species since 1865 but closely resembles a diminutive form of gypsy moth, Lymantria dispar. We tested the hypothesis that the sex pheromones of L. obfuscata and L. dispar are similar. In laboratory mate acceptance studies, very few male L. dispar made copulatory attempts when paired with female L. obfuscata, suggesting that female L. obfuscata emit one or more pheromone components antagonistic to male L. dispar. In coupled gas chromatographicâelectroantennographic detection (GCâEAD) analyses of pheromone gland extract of female L. obfuscata, (Z)-2-methyloctadec-7-ene (2Me-7Z-18Hy) and (7R,8S)-cis-7,8-epoxy-2-methyloctadecane [()-disparlure] were most abundant and elicited the strongest responses from male L. obfuscata antennae. In field experiments near Solan (Himachal Pradesh, India), 2Me-7Z-18Hy and ()-disparlure in combination attracted more male L. obfuscata than did either component alone. This two-component sex pheromone contrasts with the single-component sex pheromone [()-disparlure] of L. dispar. The contrasting composition of the lymantriid communities inhabited by L. obfuscata and L. dispar may explain why 2Me-7Z-18Hy is a pheromone component in L. obfuscata and a pheromone antagonist in L. dispar and why (â)-disparlure reduces pheromonal attraction of male L. dispar but not male L. obfuscata.
- Subjects
LYMANTRIA dispar; LYMANTRIA; LEPIDOPTERA; SEX recognition (Zoology)
- Publication
Journal of Chemical Ecology, 2007, Vol 33, Issue 9, p1774
- ISSN
0098-0331
- Publication type
Article
- DOI
10.1007/s10886-007-9328-8