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TOWARD PHEROMONE-BASED MATING DISRUPTION OF ENARMONIA FORMOSANA (LEPIDOPTERA: TORTRICIDAE) ON ORNAMENTAL CHERRY TREES

Published online by Cambridge University Press:  31 May 2012

Crawford McNair ,
Gerhard Gries  and
Mark Sidney
Crawford McNair
Affiliation:
Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
Gerhard Gries*
Affiliation:
Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
Mark Sidney
Affiliation:
Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
*
1Author to whom all correspondence should be addressed.
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Abstract

The potential for pheromone-mediated mating disruption of the cherry bark tortrix (CBT), Enarmonia formosana (Scopoli), was evaluated by attaching PVC tube dispensers to the trunks of mature (> 40 cm diameter at breast height) ornamental cherry trees, Prunus cvs., lining suburban streets of New Westminster and Vancouver, British Columbia. Dispensers released either a blend of (E)-9-dodecenyl acetate (E9-12:OAc, 49.5%), (Z)-9-dodecenyl acetate (Z9-12:OAc, 49.5%), and (Z)-7-decenyl acetate (Z7-10:OAc, 1%) at a rate of 29 mg/day (Exp. 1), or E9-12:OAc alone at 27 mg/day (Exp. 2), 4 mg/day (Exp. 3), or 0.5 mg/day (Exp. 4). A sticky Delta trap baited with a grey rubber septum impregnated with CBT pheromone components E9-12:OAc (40 μg), Z9-12:AOc (60 μg), and Z7-10:OAc (1 μg) was placed in each tree. Captures of male CBTs in treatment trees were significantly reduced compared with control trees in all experiments. Results suggest that disruption of pheromone-based communication in CBT around individual cherry trees is feasible with a pheromone blend or with E9-12:OAc alone, and could become part of an integrated management strategy for CBT in urban environments.

Résumé

Une méthode conçue pour enrayer le processus d’accouplement par l’intermédiaire de phéromones chez la tordeuse Enarmonia formosana (Scopoli) a été éprouvée par installation de tubes de PVC au tronc de cerisiers ornementaux, Prunus cvs., à maturité (> 40 cm de diamètre à hauteur de poitrine) le long des rues des banlieues de New Westminster et de Vancouver, Colombie-Britannique. Les sondes administraient un mélange d’acétate de (E)-9-dodécényl (49,5%), d’acétate de (Z)-9-dodécényl (49,5%) et d’acétate de (Z)-7-décényl (1%) à raison de 29 mg/j (Exp. 1), ou d’acétate de (E)-9-dodécényl seul à raison de 27 mg/j (Exp. 2) ou de 4 mg/j (Exp. 3) ou de 0,5 mg/j (Exp. 4). Un piège collant de type delta muni d’un septum de caoutchouc gris imprégné des composantes de la phéromone de l’insecte, l’acétate de (E)-9-dodécényl (40 μg), l’acétate de (Z-9-dodécényl (60 μg) et l’acétate de (Z)-7-décényl (1 μg), a été placé sur chaque arbre. Le nombre de mâles capturés dans les arbres traités était significativement plus faible que le nombre de mâles capturés dans les arbres témoins dans toutes les expériences. Les résultats indiquent qu’il est possible de perturber la communication basée sur les phéromones chez cette tordeuse près d’arbres spécifiques en utilisant un mélange de phéromones ou la (E)-9-12 : OAc seule dans le cadre d’une stratégie intégrée de lutte contre la tordeuse Enarmonia formosana en milieu urbain.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 131 , Issue 1 , February 1999 , pp. 97 - 105
Copyright
Copyright © Entomological Society of Canada 1999

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