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RESPONSES OF MALE SPRUCE BUDWORM MOTHS TO SEX PHEROMONE RELEASED FROM FILTER PAPER AND RUBBER SEPTA

Published online by Cambridge University Press:  31 May 2012

C.J. Sanders
C.J. Sanders
Affiliation:
Forestry Canada, Ontario Region, Sault Ste. Marie, Ontario, Canada P6A 5M7
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Abstract

The behavioral responses of male spruce budworm moths to a wide range of loadings of synthetic sex pheromone on filter paper and rubber septa were investigated in a wind tunnel. The highest proportion of males flying upwind and reaching filter-paper dispensers occurred at pheromone loadings of between 0.1 and 10 μg. Above these loadings, males were activated but upwind flight was arrested before the moths reached the pheromone source. No such arrestment occurred with rubber septa up to the maximum loading assayed, 1 mg. Up to 72% of the males that reached a septum attempted to copulate with it, but even this response was less than that to a septum in the presence of pheromone emitted by females. This confirms previous conclusions that the synthetic pheromone blend used here, 95:5 (E:Z-11-tetradecenal) is incomplete.

Résumé

La réponse comportementale des mâles de la tordeuse des bourgeons de l’épinette à une gamme étendue de doses de phéromone synthétique appliquée sur du papier filtre et sur des septa de caoutchouc a été étudiée dans un tunnel aérodynamique. La plus haute proportion de mâles volant contre le vent et atteignant le papier filtre a été obtenue à des doses de 0,1 à 10 μg. A des doses plus élevées, les mâles ont été activés mais leur vol s’est arrêté avant que la source de phéromone ne soit atteinte. De tels arrêts ne se sont pas produits avec les septa de caoutchouc, même à la dose maximum testée de 1 mg. Jusqu’à 72% des mâles qui ont atteint le septum ont tenté un accouplement avec celui-ci, mais cette réponse était moindre que celle à un septum en présence de phéromone émise par des femelles. Ceci confirme la conclusion antérieure selon laquelle le mélange de phéromones synthétiques utilisé ici, 95 : 5 (E : Z-11-tétradécènal), est incomplet.

Type
Articles
Information
The Canadian Entomologist , Volume 122 , Issue 2 , April 1990 , pp. 263 - 269
Copyright
Copyright © Entomological Society of Canada 1990

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