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OLFACTORY RESPONSES OF HYLASTES NIGRINUS (COLEOPTERA: SCOLYTIDAE) TO VARIOUS HOST MATERIALS1

Published online by Cambridge University Press:  31 May 2012

J. A. Rudinsky  and
O. Zethner-Møller
J. A. Rudinsky
Affiliation:
Department of Entomology, Oregon State University, Corvallis
O. Zethner-Møller
Affiliation:
Department of Entomology, Oregon State University, Corvallis
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Abstract

Hylastes nigrinus (Mann.) is attracted to, and breeds in, the roots of both cut and beetle-killed Douglas-fir trees; the latter are preferred. The beetles reach the roots by digging through the soil. Bark samples taken from trees of various physiological condition and placed in field olfactometers showed that the beetle prefers the bark of insect-killed trees, although bark taken from healthy Douglas-firs became attractive after some time. Among the various terpenes tested, α-pinene and β-pinene were most attractive, in addition to Douglas-fir resin itself.

Type
Articles
Information
The Canadian Entomologist , Volume 99 , Issue 9 , September 1967 , pp. 911 - 916
Copyright
Copyright © Entomological Society of Canada 1967

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