Abstract
Female pheromone gland extracts of two primitive New Zealand tortricid species that use (Z)-8- tetradecenyl acetate as a pheromone component were analyzed for pheromone precursors. Both Planotortrix excessana and Ctenopseustis obliquana contained (Z)-8- tetradecenoate as well as large amounts of (Z)-10- hexadecenoate . We propose that (Z)-8- tetradecenyl acetate is synthesized from hexadecanoate (palmitic acid) by an unusual Δ10 desaturation, chain shortening and subsequent reduction and acetylation. A Δ11 enzyme is used for sex pheromone biosynthesis in most of the Tortricinae species for which pheromone identifications have been reported.
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