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Free keywords:
lepidoptera
noctuidae
diachrysia chrysitis
diachrysia tutti
pheromones
sibling taxa
electroantennographic responses
biosynthesis
cross-attraction
ostrinia-nubilalis lepidoptera
insect sex attractants
european
corn-borer
leafroller moth
biosynthesis
chromatography
components
pyralidae
acid
Abstract:
The noctuid sibling taxa Diachrysia chrpsitis s. str. and D. tutti, of yet uncertain taxonomic status, have previously been shown to possess differences in morphology and to be attracted to different mixtures of the two presumed pheromone components (Z)-5-decenyl acetate and (Z)-7-decenyl acetate. Typical D. tutti males (clearly broken forewing marking) are known to respond to a 2:100 mixture of the two isomers, whereas D. chrysitis males (unbroken marking) are attracted to a 100:10 mixture. We investigated female pheromone production and male electroantennographic (EAG) response in Diachrysia families raised in the laboratory from held-collected gravid females. Extracts of individual females from typical D. tutti and D. chrysitis families were subjected to gas chromatography with simultaneous flame ionization and electroantennographic detection. All females produced mixtures of Z5- and Z7-10:OAc, but female D. chrysitis produced predominantly Z5-10:OAc
