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Developing techniques for monitoring forest tent caterpillar populations using synthetic pheromones

Published online by Cambridge University Press:  02 April 2012

B. Christian Schmidt  and
Jens Roland
B. Christian Schmidt*
Affiliation:
Department of Biological Sciences, CW 405, Biological Science Building, University of Alberta, Edmonton, Alberta, Canada T6G 2E9
Jens Roland
Affiliation:
Department of Biological Sciences, CW 405, Biological Science Building, University of Alberta, Edmonton, Alberta, Canada T6G 2E9
*
1Corresponding author (e-mail: [email protected]).
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Abstract

To effectively monitor forest tent caterpillar, Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae), populations using sex pheromone baited traps, we field-tested pheromone dispenser (lure) type, lure age, and trap design using (Z,E)-5,7-dodecadienal:(Z,Z)-5,7-dodecadienal (100:1). Rubber septa lures, polyurethane lures, and two trap types [sticky-type pheromone traps (Wing Trap I) and bucket-type pheromone traps (Universal Moth trap)] were evaluated. Traps baited with polyurethane lures produced higher trap catches and lower zero-catch frequencies than did rubber septa traps. There was no detectable difference in trap catch among polyurethane lures aged 0–28 days. Wing traps reached a functional saturation point in outbreak M. disstria populations and caught fewer moths than Universal traps in nonoutbreak populations. A nonsaturating trap such as the Universal trap in conjunction with the polyurethane lure should be effective for monitoring M. disstria populations.

Résumé

Pour suivre efficacement des populations de livrées des forêts, Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae), au moyen de pièges garnis de phéromone, nous avons testé sur le terrain le type de distributeur (leurre), l'âge du leurre et le design du piège avec du (Z,E)-5,7-dodécadienal: (Z,Z)-5,7-dodécadienal (100: 1). Des leurres à septums de caoutchouc, des leurres de polyuréthane et deux types de pièges [(pièges collants à phéromones (pièges à ailettes de type I) et pièges phéromones de type seau (Universal Moth trap)] ont été évalués. Les pièges garnis de leurres de polyuréthane ont donné un meilleur rendement et produit moins de captures à fréquence zéro que les pièges à leurres à septums de caoutchouc. Il n'y avait pas de différence perceptible entre les taux de capture des divers pièges de polyuréthane en opération depuis 0–28 jours. Les pièges à ailettes ont atteint un point de saturation fonctionnel au moment des invasions des populations de livrées et capturé moins de livrées que des pièges Universal en dehors des périodes de foisonnement. La combinaison d'un piège non saturable comme le piège Universal et d'un leurre de polyuréthane semble constituer une technique bien appropriée à l'étude des populations de M. disstria.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 135 , Issue 3 , June 2003 , pp. 439 - 448
Copyright
Copyright © Entomological Society of Canada 2003

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