title: Semiochemicals produced by western balsam bark beetle,Dryocoetes confusus Swaine (Coleoptera: Scolytidae).
abstract: The most prominent beetle-produced volatiles identified in the abdominal extracts of maleDryocoetes confusus Swaine after they had bored for 24 hr in logs of subalpine fir,Abies lasiocarpa (Hook.) Nutt. were:exo andendo-brevicomin,trans-verbenol, verbenone, myrtenol,trans-pinocarveol,cis- andtrans-p-menthen-7-ol, 3-caren-10-ol, and several monoterpenes and sesquiterpenes. Myrtenol was the only conspicuous compound in extracts from males that had been exposed toA.lasiocarpa resin volatiles for 24 hr. Laboratory bioassays indicated that both (-)- and (+)-exo-brevicomin were attractive to femaleD. confusus, and that the (-) enantiomer did not inhibit response to its antipode. Results from field trapping experiments indicated that bothero-brevicomin and myrtenol are aggregation pheromones forD. confusus.exo-Brevicomin baits were effective in causing attack byD. confusus on baited and surrounding trees, suggesting that this pheromone may have utility in manipulating populations of the beetle.
authors.affiliation: Department of Biological Sciences, Centre for Pest Management, Canada.
authors.forename: J H
authors.initials: JH
authors.lastname: Borden
authors.forename: A M
authors.initials: AM
authors.lastname: Pierce
authors.forename: H D
authors.initials: HD
authors.lastname: Pierce
authors.forename: L J
authors.initials: LJ
authors.lastname: Chong
authors.forename: A J
authors.initials: AJ
authors.lastname: Stock
authors.forename: A C
authors.initials: AC
authors.lastname: Oehlschlager