Verbenone interrupts the response to aggregation pheromone in the northern spruce engraver, Ips perturbatus (Coleoptera: Scolytidae), in south-central and interior Alaska

Authors

  • Edward H. Holsten U.S. Department of Agriculture Forest Service, Pacific Northwest Research Station Anchorage, AK 99503
  • Roger E. Burnside State of Alaska, Department of Natural Resources Division of Forestry Anchorage, AK 99501
  • Steven J. Seybold Departments of Entomology and Forest Resources University of Minnesota St. Paul, MN 55108

Abstract

Field tests of verbenone, a potential antiaggregation pheromone of the northern spruce engraver, Ips perturbatus (Eichhoff), were conducted in south-central and interior Alaska in stands of Lutz spruce, Picea xlutzii (Little), and white spruce, P. glauca (Moench) Voss, respectively. Addition of 84%-(-)-verbenone at a high release rate to the three-component aggregation pheromone of I. perturbatus (racemic ipsenol, racemic ipsdienol, and 83%-(-)-cis-verbenol), significantly reduced trap catches. The results of this study, combined with previous results on the presence of verbenone in extracts of volatiles collected from feeding I. perturbatus and GC-EAD data, are consistent with antiaggregant behavioral activity of verbenone for I. perturbatus.

Key words: Bark beetles; Ips perturbatus; semiochemicals; pheromones; antiaggregation pheromones; verbenone; white spruce; Picea glauca; Lutz spruce; Picea xlutzii; Alaska

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Vol. 98 (2001): Journal of the Entomological Society of British Columbia

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Articles

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