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ATTRACTION OF HYLOBIUS PALES (HERBST) (COLEOPTERA: CURCULIONIDAE) TO PHEROMONES OF BARK BEETLES (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

Thomas W. Phillips
Thomas W. Phillips
Affiliation:
Entomology and Nematology Department, University of Florida, Gainesville, Florida, USA 32611
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Abstract

Results of a field experiment indicate that adults of the pine weevil Hylobius pales (Herbst) respond to pheromones of bark beetles. Each sex of H. pales was more attracted to traps baited with the combination of a pine bolt infested with male Ips calligraphus Germar plus the synthetic Dendroctonus Erichson pheromones frontalin and exo-brevicomin, than to traps baited with pine bolts alone. The combined numbers of male and female H. pales caught in traps baited only with Ips calligraphus-infested bolts were significantly greater than numbers caught in traps baited with uninfested control bolts. The attraction of H. pales to bark beetle pheromones may represent a kairomonal response in which weevils exploit semiochemicals from other species that signify a suitable host resource.

Résumé

Les résultats de terrain indiquent que les adultes du charançon du pin, Hylobius pales (Herbst), réagissent aux phéromones des scolytes. Pour chaque sexe, les adultes de H. pales ont surtout été attirés par les pièges constitués des billes de pins infestées par des mâles de Ips calligraphus Germar combinées aux phéromones synthétiques de Dendroctonus Erichson, la frontaline et la exo-brevicomine, comparativement aux pièges constitués de billes de pins seules. Le nombre total d’adultes de H. pales capturés avec des pièges dont les appâts étaient des billes infestées par I. calligraphus, a été significativement plus élevé que le nombre de captures faites avec des billes témoins seules. L’attraction de H. pales par des phéromones de scolytes peut représenter une réponse kairomonale où les charançons utilisent les substances sémiochimiques des autres espèces qui lui indiquent alors une ressource hôte favorable.

Type
Articles
Information
The Canadian Entomologist , Volume 122 , Issue 3 , June 1990 , pp. 423 - 427
Copyright
Copyright © Entomological Society of Canada 1990

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