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HOST RESISTANCE TO THE FIR ENGRAVER BEETLE, SCOLYTUS VENTRALIS (COLEOPTERA: SCOLYTIDAE): 2. REPELLENCY OF ABIES GRANDIS RESINS AND SOME MONOTERPENES1

Published online by Cambridge University Press:  31 May 2012

Robert P. Bordasch  and
Alan A. Berryman
Robert P. Bordasch
Affiliation:
Department of Entomology, Washington State University, Pullman
Alan A. Berryman
Affiliation:
Department of Entomology, Washington State University, Pullman
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Abstract

Cortical blister and wound reaction resin vapors from Abies grandis, and some of their monoterpene fractions, were quantitatively bioassayed for attractiveness and repellency to the fir engraver beetle, Scolytus ventralis. All were found to be repellent.

Quantitative differences between liquid resins and vapors were examined. Wound reaction resin vapors contained higher percentages of the more repellent monoterpenes than cortical blister resin vapors. It is hypothesized that α-pinene is the most important monoterpene in the insects’ perception of a resistant host.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 1 , January 1977 , pp. 95 - 100
Copyright
Copyright © Entomological Society of Canada 1977

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References

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