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CONTROL OF ORIENTAL FRUIT MOTH BY MATING DISRUPTION USING SEX PHEROMONE IN THE NIAGARA PENINSULA, ONTARIO

Published online by Cambridge University Press:  31 May 2012

D.J. Pree
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
R.M. Trimble
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
K.J. Whitty
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
P.M. Vickers
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0

Abstract

Disruption of mating for control of Oriental fruit moth [Grapholita molesta (Busck) (Lepidoptera: Tortricidae)] using Isomate M pheromone dispensers was tested from 1987 to 1990 in the Niagara Peninsula of Ontario. The effectiveness of pheromone was evaluated using virgin female-baited traps, synthetic pheromone-baited traps, and by inspecting samples of twigs and fruit for evidence of G. molesta damage. No males were caught in virgin female-baited traps placed in pheromone-treated plots. Synthetic pheromone-baited trap catches of male moths were reduced by 85–100%. Pheromone provided commercially acceptable control over two consecutive growing seasons at a commercial farm with a relatively low density G. molesta population. Pheromone did not provide commercially acceptable control at an experimental farm with a relatively high density G. molesta population. The incidence of capture of males in virgin female-baited traps, in synthetic pheromone-baited traps, and the incidence of damage to peach twigs by first- and second-generation G. molesta larvae could not be used to predict the incidence of damage to fruit at harvest. The results suggest that pheromone-mediated mating disruption may have potential as a method for controlling the Oriental fruit moth in orchards with relatively low density populations.

Résumé

L’efficacité de l’interruption de la copulation par application d’Isomate M phéromone comme mesure de lutte contre la Tordeuse orientale du pêcher [Grapholita molesta (Busck) (Lepidoptera : Tortricidae)] a été évaluée de 1987 à 1990 dans la péninsule de Niagara, Ontario. L’efficacité de la phéromone a été évaluée par utilisation de pièges contenant des femelles vierges, de pièges garnis de phéromone synthétique et par examen des dommages causés par G. molesta sur des rameaux et des fruits. Dans les carrés échantillons traités à la phéromone, aucun mâle n’a été capturé dans les pièges contenant des femelles vierges et les pièges garnis de phéromone synthétique ont attiré 85–100% moins de mâles. La phéromone s’est donc avérée un moyen de lutte acceptable d’un point de vue commercial, pendant deux saisons consécutives de croissance, sur une ferme commerciale abritant une population de G. molesta de densité relativement faible. Cependant, la phéromone n’a pas eu une efficacité commercialement acceptable sur une ferme expérimentale où la population de G. molesta était relativement dense. Le nombre de captures de mâles dans les pièges contenant des femelles vierges ou dans les pièges garnis de phéromone synthétique et l’importance des dommages causés aux rameaux de pêchers par les larves de première et seconde générations de G. molesta n’ont pas permis de prédire l’importance des dommages aux fruits au moment de la récolte. Les résultats indiquent que l’interruption de la copulation par traitement à la phéromone a du potentiel comme agent de lutte contre la Tordeuse orientale du pêcher dans les vergers où les populations sont de densité relativement faible.

[Traduit par la Rédaction]

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1994

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