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IDENTIFICATION OF HOST ORIGIN OF PARASITES OF BARK BEETLES (COLEOPTERA: SCOLYTIDAE) BY FATTY ACID COMPOSITION1

Published online by Cambridge University Press:  31 May 2012

Louis H. Kudon  and
C. Wayne Berisford
Louis H. Kudon
Affiliation:
Department of Entomology, University of Georgia, Athens 30602
C. Wayne Berisford
Affiliation:
Department of Entomology, University of Georgia, Athens 30602
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Abstract

The free fatty acid composition of the southern pine beetle, Dendroctonus frontalis Zimmermann, and associated bark beetles was determined by gas-liquid chromatography. The lipid composition of several species of hymenopterous parasites matched the bark beetle hosts from which they were reared. Lipids from field collected parasites were compared with the lipid composition of possible bark beetle hosts to determine host of origin. Parasites ovipositing on a host were usually found to have a lipid composition matching that host. Approximately 20% of the parasites that were observed attempting to parasitize the southern pine beetle apparently developed on other bark beetle hosts.

Résumé

La composition en acides gras libres du dendroctone méridional du pin, Dendroctonus frontalis Zimmermann, et d’autres scolytes qui lui sont associés a été déterminée par chromatographie en phase gazeuse (GLC). La composition lipidique de plusieurs espèces d’hyménoptères parasites correspond à celle des scolytes leur ayant servi d’hôtes. Les lipides de parasites récoltés sur le terrain ont été comparés à ceux de scolytes leur ayant possiblement servi d’hôtes afin de déterminer l’hôte dont ils provenaient. Les parasites déposant leurs œufs sur un hôte montrent généralement une composition lipidique correspondant à celle de cet hôte. Environ 20% des parasites observés en train de parasiter D. frontalis provenaient apparemment d’autres espèces de scolytes.

Type
Articles
Information
The Canadian Entomologist , Volume 113 , Issue 3 , March 1981 , pp. 205 - 212
Copyright
Copyright © Entomological Society of Canada 1981

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