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THE USE OF MONOTERPENES AS KAIROMONES BY IPS LATIDENS (LECONTE) (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

D.R. Miller*
Affiliation:
Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
J.H. Borden
Affiliation:
Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
*
1 Author to whom all correspondence should he addressed.

Abstract

The responses of Ips latidens (LeConte) to multiple-funnel traps baited with various monoterpenes were determined in stands of lodgepole pine in British Columbia. β-Phellandrene was attractive to I. latidens in the absence of the pheromone ipsenol. β-Phellandrene increased the attraction of I. latidens to ipsenol-baited traps while α-pinene, 3-carene, terpinolene, and myrcene reduced trap catches. Differential responses by males and females to sources of ipsenol with or without β-phellandrene suggest that the information conveyed to males differs from that conveyed to females. Species-specific responses to monoterpenes by I. latidens and three sympatric species of scolytids suggest that unique combinations of kairomones could be important in facilitating matings with conspecifics. Pheromones need not be the sole constituent of species-specific chemical messages.

Résumé

La réponse d’Ips latidens (LeConte) à divers monoterpènes placés dans des pièges à entonnoirs multiples a été déterminée dans des peuplements de pin lodgepole en Colombie britannique. β-Phellandrène a attiré I. latidens en absence de la phéromone ipsénol. β-Phellandrène a accru l’attraction de I. latidens vers des pièges contenant ipsenol alors que α-pinène, 3-carène, terpinolène et myrcène ont réduit les captures. Des niveaux de réponse différents pour mâles et femelles à des sources d’ipsénol, avec ou sans β-phellandrène, suggèrent que l’information transmise aux mâles diffère de celle transmise aux femelles. L’existence de réponses aux monoterpènes spécifiques à l’espèce, pour I. latidens et trois espèces sympatriques de scolytes, suggèrent que des combinaisons uniques de kairomones pourraient être importantes dans la facilitation de l’accouplement avec des individus con-spécifiques. Les phéromones ne sont pas nécessairement les seules composantes des messages chimiques spécifiques à l’espèce.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1990

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