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Attraction of male Mayetiola thujae (Diptera: Cecidomyiidae) to the sex-pheromone blend of (2S,12S)-, (2S,13S)-, and (2S,14S)-diacetoxyheptadecane is reduced in the presence of the SR- or RR-stereoisomers

Published online by Cambridge University Press:  02 April 2012

Regine Gries ,
Robb G. Bennett ,
Grigori Khaskin  and
Gerhard Gries
Regine Gries
Affiliation:
Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
Robb G. Bennett
Affiliation:
Tree Improvement Branch, British Columbia Ministry of Forests and Range, 7380 Puckle Road, Saanichton, British Columbia, Canada V8M 1W4
Grigori Khaskin
Affiliation:
Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
Gerhard Gries*
Affiliation:
Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
*
1Corresponding author (e-mail: [email protected]).
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Abstract

In a field trapping experiment in an abandoned seed orchard of western red-cedar, Thuja plicata Donn × D. Don, in British Columbia, we show that attraction of male red-cedar cone midges, Mayetiola thujae (Hedlin), to the pheromone blend (2S,12S)-, (2S,13S)-, and (2S,14S)-diacetoxyheptadecane is reduced in the presence of a blend of all other stereoisomers, or of the three SR- or RR-stereoisomers. The three RS-stereoisomers, in contrast, had no significant effect. Thus, synthetic pheromone for monitoring M. thujae populations must not contain the SR- or RR-stereoisomers of 2,12-, 2,13-, and 2,14-diacetoxyheptadecane. This result will allow development of a less expensive design for synthesizing the pheromone.

Résumé

Dans une expérience de piégeage dans une pépinière à graines de thuyas géants, Thuja plicata Donn × D. Don, abandonnée en Colombie-Britannique, nous montrons que l'attraction des mâles de la cécidomyie des cônes du thuya géant, Mayetiola thujae (Hedlin), au mélange de phéromones (2S,12S)-, (2S,13S)- et (2S,14S)-diacétoxyheptadécanes est réduite en présence d'un mélange de tous les autres stéréoisomères ou des trois stéréoisomères SR- ou RR-. En revanche, les trois stéréoisomères RS- restent sans effet significatif. La phéromone synthétique utilisée pour la surveillance des populations de M. thujae ne doit donc pas contenir de stéréoisomères SR- ou RR- des 2,12-, 2,13-, et 2,14-diacétoxyheptadécanes. Cette observation permettra de mettre sur pied une synthèse moins coûteuse de la phéromone.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 139 , Issue 5 , October 2007 , pp. 685 - 689
Copyright
Copyright © Entomological Society of Canada 2007

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