Response of the western balsam bark beetle, dryocoetes confusus swaine (coleoptera: Scolytidae), to host trees baited with enantiospecific blends of exo- and endo-brevicomin

Alejandro D. Camacho, John H. Borden

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The response of the western balsam bark beetle, Dryocoetes confusus Swaine, to subalpine firs, Abies lasiocarpa (Hook.) Nutt., baited with (±)-exo-brevicomin (EXOB) or 9:1 blends of EXOB and endo-brevicomin (ENDOB), in two chiral combinations: (+):(+) and (+):(+), was assessed in a heavily infested stand in British Columbia. Unbaited control trees were not attacked, and the proportion of mass-attacked baited trees was similar for all other treatments. However, trees baited with the (+):(+) blend had the highest number of attacks per square metre, and they were also surrounded by the most attacked trees. The (+):(+) blend was intermediate in attractancy, and (±)EXOB was the least attractive bait. Pheromone-based management of D. confusus infestations may be more effective with the 9:1 blend of (+)EXOB:(+)ENDOB than with the previously used (±)EXOB baits. © 1994, Entomological Society of Canada. All rights reserved.
Original languageAmerican English
Pages (from-to)43-48
Number of pages38
JournalThe Canadian Entomologist
StatePublished - 1 Jan 1994
Externally publishedYes


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