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ATTRACTION OF THE TWOLINED CHESTNUT BORER, AGRILUS BILINEATUS (WEBER) (COLEOPTERA: BUPRESTIDAE), AND ASSOCIATED BORERS TO VOLATILES OF STRESSED WHITE OAK1

Published online by Cambridge University Press:  31 May 2012

James P. Dunn ,
Thomas W. Kimmerer  and
Gerald L. Nordin
James P. Dunn
Affiliation:
Departments of Entomology and Forestry, University of Kentucky, Lexington, Kentucky, USA 40546
Thomas W. Kimmerer
Affiliation:
Departments of Entomology and Forestry, University of Kentucky, Lexington, Kentucky, USA 40546
Gerald L. Nordin
Affiliation:
Departments of Entomology and Forestry, University of Kentucky, Lexington, Kentucky, USA 40546
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Abstract

The twolined chestnut borer, Agrilus bilineatus (Weber) (Coleoptera: Buprestidae), is associated with mortality of stressed oaks in the eastern deciduous forests of North America. Beetles were attracted to stressed trees within hours of the onset of stress. We hypothesized that adult beetles rapidly locate suitable hosts by olfactory detection of tree-released volatiles. Trees with sticky-band traps and vane traps baited with crude steam distillates from inner bark of stressed white oaks, or with combinations of ethanol and oak volatiles, captured significantly more beetles than did water controls. Ethanol alone did not attract significant numbers of A. bilineatus. Eighty-two percent of beetles captured were females. Ethanol-baited traps captured large numbers of Cerambycidae, Scolytidae, and a few Cleridae, and these insects were not attracted to oak volatiles. Sticky-band traps were more effective than vane traps in capturing A. bilineatus and other Buprestidae, but Cerambycidae and Scolytidae were more effectively captured in vane traps. Our results show that A. bilineatus is attracted to oak volatiles but later successional beetles are attracted to ethanol.

Résumé

Le perceur, Agrilus bilineatus (Weber) (Coleoptera : Buprestidae), est associé à la mortalité des chênes soumis au stress dans les forêts de feuillus des régions Est de l’Amérique du Nord. Les coléoptères étaient attirés par des arbres soumis au stress dans les heures qui suivirent les premières attaques de la maladie. Nous sommes partis de l’hypothèse que les coléoptères adultes trouvent rapidement les hôtes convenables par détection olfactive des volatiles émanant de l’arbre. Les arbres des pièges englués et des pièges enterrés amorcés par des vapeurs non raffinées de la distillation d’écorces internes de chênes blancs soumis au stress, ou d’un mélange d’éthanol et de volatiles de chêne, ont attrapé significativement plus de coléoptères que les pièges à eau témoins. L’éthanol seul n’a pas attiré un nombre significatif de A. bilineatus. Quatre-vingt-deux pour cent des coléoptères capturés étaient des femelles. Les pièges à éthanol ont capturé un grand nombre de Cerambycidae, Scolytidae et quelques Cleridae, et ces insectes n’ont pas été attirés par les volatiles du chêne. Les pièges englués étaient plus efficaces que les pièges enterrés pour la capture des A. bilineatus ainsi que des Buprestidae, alors que les Cerambycidae et Scolytidae étaient plus efficacement capturés par les pièges enterrés. Nos recherches montrent que A. bilineatus est attiré par les volatiles de chêne alors que les coléoptères attirés par l’éthanol, attaquent les arbres morts.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 6 , June 1986 , pp. 503 - 509
Copyright
Copyright © Entomological Society of Canada 1986

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