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BIOACTIVITY AND EFFICACY OF MCOL AND SEUDENOL AS POTENTIAL ATTRACTIVE BAIT COMPONENTS FOR DENDROCTONUS RUFIPENNIS (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

Robert R. Setter  and
John H. Borden
Robert R. Setter
Affiliation:
Bugbusters Pest Management Inc., Box 1750, Prince George, British Columbia, Canada V2L 4v7
John H. Borden
Affiliation:
Centre for Environmental Biology, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
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Abstract

In randomized complete block experiments using multiple-funnel traps frontalin was only moderately attractive to spruce beetles, Dendroctonus rufipennis Kirby, in northern British Columbia. MCOL (1-methylcyclohex-2-en-1-ol) of any enantiomeric composition significantly enhanced the attraction of both sexes (up to 3.4 and 4.2 times for females and males, respectively) to traps baited with frontalin. The lack of an enantiospecific preference for MCOL aligns beetles in northern British Columbia with those in southeastern British Columbia and northern Alberta, but not with enantiospecific populations in southern British Columbia and Alaska. In tree baits, neither MCOL nor seudenol (3-methylcyclohex-2-en-1-ol) enhanced the efficacy of frontalin. The power of frontalin alone at a release rate of 1.2 mg per 24 h (half the rate in commercial baits) indicates that the currently used operational tree baits could be modified by lowering the dose and eliminating α-pinene.

Résumé

Dans un plan d’expériences à blocs complets aléatoires utilisant des pièges à entonnoirs multiples, la frontaline s’est avérée modérément attirante pour le Dendroctone de l’épinette, Dendroctonus rufipennis Kirby, dans le nord de la Colombie-Britannique. Le MCOL (1-méthylcyclohex-2-en-1-ol), de n’importe quelle composition énantiomère, augmente significativement l’attirance des mâles et des femelles (jusqu’à 3,4 fois pour les femelles et 4,2 fois pour les mâles) vers les pièges garnis de frontaline. L’absence de préférence énantiospécifique pour le MCOL apparente les dendroctones du nord de la Colombie-Britannique à ceux du sud-est de la Colombie-Britannique et du nord de l’Alberta, mais non à ceux des populations énantiospécifiques du sud de la Colombie-Britannique ou de l’Alaska. Dans les pièges installés dans les arbres, ni le MCOL, ni le seudénol (3-méthylcyclohex-2-en-1-ol) n’augmentent l’efficacité de la frontaline. L’efficacité de la frontaline seule, administrée à raison de 1,2 mg/24 h (la moitié du taux administré dans les pièges commerciaux) indique que les pièges couramment utilisés pourraient être modifiés par diminution de la dose et élimination de l’α-pinène.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 131 , Issue 2 , April 1999 , pp. 251 - 257
Copyright
Copyright © Entomological Society of Canada 1999

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