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Field testing of synthetic attractants for male Grapholita libertina (Lepidoptera: Tortricidae)1

Published online by Cambridge University Press:  31 May 2012

N.K. Hillier*
Affiliation:
Agriculture and Agri-Food Canada, Atlantic Cool Climate Crop Research Centre, PO Box 39088, St. John's, Newfoundland, Canada A1E 5Y7
P.L. Dixon
Affiliation:
Agriculture and Agri-Food Canada, Atlantic Cool Climate Crop Research Centre, PO Box 39088, St. John's, Newfoundland, Canada A1E 5Y7
W.D. Seabrook
Affiliation:
University of New Brunswick, Biology Department, PO Bag Service 45111, Fredericton, New Brunswick, Canada E3B 6E1
D.J. Larson
Affiliation:
Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X9
*
2 Corresponding author (e-mail: [email protected]).

Abstract

In an effort to develop an efficient monitoring method for the lingonberry fruitworm, Grapholita libertina Heinrich, an economically important pest of lingonberries, Vaccinium vitis-idaea L. var. minus Lodd. (Ericaceae), in Newfoundland, various known sex attractants for other species of the genus Grapholita Treitschke were evaluated for their ability to attract G. libertina moths in field trials in eastern Newfoundland. The chemicals tested were (E,E)-8,10-dodecadien-1-ol acetate (EE8,10-12:Ac), (E)-8-dodecen-1-ol acetate (E8-12:Ac), (Z)-8-dodecen-1-ol acetate (Z8-12:Ac), and (Z)-8-dodecen-1-ol (Z8-12:OH). Field trials in 1996 showed highest attraction to E8-12:Ac, with Z8-12:Ac and Z8-12:OH also being attractive. Trials in 1997 demonstrated that a blend of E8-12:Ac, Z8-12:Ac, and Z8-12:OH at a ratio of 85:10:5, respectively, was attractive to G. libertina males. All chemicals captured significantly more moths than did controls and all moths examined were males indicating these chemicals may be constituents of the naturally occurring female sex pheromone.

Résumé

Dans le cadre de recherches d'une méthode efficace pour étudier la tordeuse de la lingonne, Grapholita libertina Heinrich, un important ravageur de la lingonne, Vaccinium vitis-idaea L. var. minus Lodd. (Ericaceae) à Terre-Neuve, diverses substances connues pour leur pouvoir d'attraction sexuelle chez plusieurs espèces du genre Grapholita Treitschke ont été testées pour leur capacité d'attirer des G. libertina au cours d'expériences sur le terrain dans l'est de Terre-Neuve. Les substances suivantes ont servi au cours des tests : l'acétate de (E,E)-8,10-dodécadién-1-ol (EE8,10-12 : Ac), l'acétate de (E)8-dodécén-1-ol (E8-12 : Ac), l'acétate de (Z)-8-dodécén-1-ol (Z8-12 : Ac) et le (Z)-8-dodécén-1-ol (Z8-12 : OH). Les tests en nature en 1996 ont démontré que c'est le E8-12 : Ac qui est le plus attirant et que le Z8-12 : Ac et le Z8-12 : OH ont aussi un pouvoir d'attraction. Les tests de 1997 ont montré qu'un mélange de E8-12 : Ac, de Z8-12 : Ac et de Z8-12 : OH, dans des proportions de 85 : 10 : 5 respectivement, est efficace pour attirer des mâles de G. libertina Toutes les substances testées attirent significativement plus de tordeuses que des produits témoins et les spécimens capturés sont toujours des mâles, ce qui semble indiquer que ces substances entrent probablement dans la composition de la phéromone sexuelle naturelle de la femelle.

[Traduit par la Rédaction]

Type
Articles
Copyright
Copyright © Entomological Society of Canada 2002

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Footnotes

1

Contribution No. 134 of the Atlantic Cool Climate Crop Research Centre, St. John's, Newfoundland.

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