Sex Pheromone Components of Pink Gypsy Moth, Lymantria mathura |
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Authors: | Gerhard Gries Regine Gries Paul W Schaefer Tadao Gotoh Yasutomo Higashiura |
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Institution: | Department of Biological Sciences, Simon Fraser University, Burnaby, B.C. V5A1S6, Canada, CA United States Department of Agriculture, Agricultural Research Service, Beneficial Insects Introduction Research Laboratory, Newark, DE 19713, USA, US Tohoku Research Center, Forestry and Forest Product Research Institute, Nabeyashiki 72, Shimokuriyagawa, Morioka, Iwate Prefecture 020-01, Japan, JP Hokkaido Forestry Research Institute, Koshunai, Bibai, Hokkaido 079-01, Japan, JP
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Abstract: | Pheromone extract of female pink gypsy moth, Lymantria mathura, was analyzed by coupled gas chromatographic-electroantennographic detection (GC-EAD) and coupled GC-mass spectrometry (MS),
employing fused silica columns coated with DB-5, DB-210, or DB-23 and a custom-made GC column that separated enantiomers of
unsaturated epoxides. These analyses revealed (9R,10S)-cis–9,10-epoxy-Z3,Z6-nonadecadiene termed here (+)-mathuralure] and (9S,10R)-cis–9,10-epoxy-Z3,Z6-nonadecadiene termed here (–)-mathuralure] at a 1 : 4 ratio as major candidate pheromone components. In field experiments
in northern Japan (Morioka, Iwate Prefecture and Bibai, Hokkaido Prefecture), (+)- and (–)-mathuralure at a ratio of 1 : 4,
but not 1 : 1 or singly, were attractive to male L. mathura. This is the first demonstration that attraction of male moths required the very same ratio of pheromone enantiomers as produced
by conspecific females. Whether L. mathura employ different blend ratios in different geographic areas, and the role of five additional candidate pheromone components
identified in this study remains to be investigated.
Received: 29 October 1998 / Accepted in revised form: 29 December 1998 |
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