Pheromone interruption of pine engraver, Ips pini, by pheromones of mountain pine beetle, Dendroctonus ponderosae (Coleoptera: Scolytidae)
The effect of pheromones of Dendroctonus ponderosae Hopkins on the attraction of Ips pini (Say) to its pheromone, ipsdienol, was investigated in stands of lodgepole pine. The mixture of cis- and trans-verbenol significantly reduced catches of I. pini in traps baited with ipsdienol at three locations in British Columbia. exo-Brevicomin had no effect on catches of I. pini, irrespective of the enantiomeric composition of exobrevicomin. Ipsdienol did not significantly reduce the attraction of D. ponderosae to traps baited with cis - and trans-verbenol, and (±)-exo-brevicomin.
Key Words: Coleoptera; Scolytidae; Ips pini; Dendroctonus ponderosae; pheromone interruption; synomone; exo-brevicomin; cis-verbenol; trans-verbenol; ipsdienol
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