The odour bouquet of three pine engraver beetles (Ips spp.)
1986
Francke, W. (Hamburg Univ. (Germany, F.R.). Inst. fuer Organische Chemie) | Pan, M.-L. | Bartels, J. | Koenig, W.A. | Vite, J.P. | Krawielitzki, S. | Kohnle, U.
Nearly 50 volatile compounds are identified from hindguts of the pine engraver Ips acuminatus, I. sexdentatus and I. lecontei. Among these, alpha-phellandren-8-ol, ipsdienon, ipsenon and others are described from bark beetles for the first time. The quantitative composition of the odour bouquet of both sexes largely depends on the phase of colonization; after the initial phase of attack, they are particularly rich in oxidized monoterpenes. I. acuminatus and I. lecontei contain the male specific terpene alcohols (+)-ipsdienol and (-)-ipsenol in high optical purity while I. sexdentatus produces racemates. Racemic ipsdienol proves attractive to I. sexdentatus under field conditions, but does not seem to promote the subsequent steps in colonization such as landing or penetrating the bark
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