ArticleJournal of chemical ecology2026
(3E,5Z)-Octadien-2-ol is an Aggregation-Sex Pheromone Produced by Males of the Queensland Longhorned Beetle, Acalolepta aesthetica (Olliff 1890).
Article in Journal of chemical ecology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
We describe the identification, synthesis, and field testing of an aggregation-sex pheromone produced by male Acalolepta aesthetica (Olliff 1890) (Coleoptera: Cerambycidae: Lamiinae), a cerambycid beetle native to Australia that has recently become established in Hawai'i. Comparing extracts of headspace volatiles from both sexes revealed that males emitted two sex-specific volatiles, (3E,5Z)-octadien-2-ol and (3E,5Z)-octadien-2-one. Both compounds were synthesized and their bioactivity was tested in field bioassays. Only (3E,5Z)-octadien-2-ol was attractive to beetles of both sexes in these trials, and the corresponding ketone appeared to antagonize attraction when combined with the alcohol. In a dose-response study, traps baited with all doses of (3E,5Z)-octadien-2-ol except 33.3 mg captured more beetles than solvent-control traps, with no significant differences among the effective doses. In a subsequent field trial, beetle capture did not differ between 100 mg of a racemic blend and the insect-produced (R)-enantiomer of this compound, indicating that the unnatural (S)-enantiomer is not antagonistic. No other cerambycid species were captured during our field trials. The structural motif of (3E,5Z)-octadien-2-ol is unique among pheromones identified from lamiines to date. Together, our findings provide a foundation for developing pheromone-based tools to detect, delimit and potentially manage A. aesthetica.
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