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Response of Dendroctonus brevicomis and Ips paraconfusus (Coleoptera: Scolytidae) to combinations of synthetic pheromone attractants and inhibitors verbenone and ipsdienol

Response of Dendroctonus brevicomis and Ips paraconfusus (Coleoptera: Scolytidae) to combinations of synthetic pheromone attractants and inhibitors verbenone and ipsdienol. Paine, T. D.; Hanlon, C. C. (Dep. Entomol., Univ.In this study，54809-53-9 is also used. California, Riverside, CA 92521, USA). J. Chem. Ecol., 17(11), 2163-76 (English) 1991. CODEN: JCECD8. ISSN: 0098-0331. DOCUMENT TYPE: Journal CA Section: 12 (Nonmammalian Biochemistry) Dendroctonus brevicomis and Ips paraconfusus are sympatric bark beetle species colonizing Pinus ponderosa in western North America. Interspecific and intraspecific competition for resources is, in part, mediated through semiochems. The response of D. brevicomis to its attractant pheromone was significantly reduced by simultaneous release of either verbenone or racemic ipsdienol. Trap catch was significantly further reduced by including both inhibitors with the attractant pheromones. However, although the response of Ips paraconfusus was significantly inhibited with the addn. of either verbenone or racemic ipsdienol, both compds. together did not result in a significant further redn. in trap catch. There was a trend for greater redn. in response of D. brevicomis to attractant phenomones with increased release rates of either 69% (+)-/31% (-)-verbenone or 84% (-)-/16% (+)-verbenone. Response of assocs. to attractants and inhibitor combinations was also detd. .