Comparison of a -pinene and myrcene on attraction of mountain pine beetle, Dendroctonus ponderosae (Coleoptera: Scolytidae) to pheromones in stands of western white pine
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Multiple-funnel traps baited with exo-brevicomin and a mixture of cis- and trans-verbenol were used to test the relative attractiveness of myrcene and (-)-a -pinene to the mountain pine beetle, Dendroctonus ponderosae Hopkins, in a stand of western white pine, Pinus monticola Dougl. Traps baited with myrcene caught significantly more D. ponderosae than traps baited with (-)-a -pinene, irrespective of the presence of exo-brevicomin. exo-Brevicomin was attractive to Thanasimus undatulus (Say) (Coleoptera: Cleridae), whereas Trypodendron lineatum (Olivier) (Coleoptera: Scolytidae) was attracted to (-)-a -pinene. Our results support the use of myrcene in commercial trap lures and tree baits for D. ponderosae in stands of western white pine in British Columbia.