Field testing of synthetic attractants for male Grapholita libertina (Lepidoptera: Tortricidae)l - NK ~illier,~" PL Dixon Agriculture and Agri-Food Canada, Atlantic Cool Climate Crop Research Centre, PO Box 39088, St. John's, Newfoundland, Canada AIE 5Y7 WD Seabrook University of New Brunswick, Biology Department, PO Bag Service 45111, Fredericton, New Brunswick, Canada E3B 6E1 DJ Larson Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3x9 The Canadian Entomologist 134: 657 - 665 (2002) 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- l-ol acetate (EE8,lO-12:Ac), (9-8-dodecen-1-01 acetate (E8-12:Ac), (9-8-dodecen- 1-01 acetate (Z8- 12:Ac), and (9-8-dodecen- 1-01 (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, 28- 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. Hillier NK, Dixon PL, Seabrook WD, Larson DJ. 2002. valuation en nature du pouvoir d'attraction de diverses substances synthktiques sur les m2les de Grapholita libertina (Lepidoptera : Tortricidae). The Canadian Entomologist 134 : 657-665. R C s u m G D a n s le cadre de recherches d'une mCthode efficace pour Ctudier la tor- deuse de la lingonne, Grapholita libertina Heinrich, un important ravageur de la lin- gonne, Vaccinium vitis-idaea L. var. minus Lodd. (Ericaceae) a Terre-Neuve, diverses substances connues pour leur pouvoir d'attraction sexuelle chez plusieurs espkces du genre Grapholita Treitschke ont CtC testCes pour leur capacitC d'attirer des G. libertina au cours d'expkriences sur le terrain dans l'est de Terre-Neuve. Les substances suivantes ont servi au cours des tests : I'acCtate de (E,E)-8,lO- dodCcadiCn-1-01 (EE8,lO-12:Ac), I'acCtate de (E)-8-dodCcCn-1-01 (E8-12:Ac), I'acCtate de (Z)-8-dodCcCn- 1-01 (Z8- 12:Ac) et le (Z)-8-dodCcCn- l-ol (28- 12:OH). Les tests en nature en 1996 ont dCmontrC que c'est le E8-12:Ac qui est le plus atti- rant et que le Z8-12:Ac et le Z8-12:OH ont aussi un pouvoir d'attraction. Les tests de 1997 ont montrC qu'un mClange de E8-12:Ac, de 28-12:Ac et de 28-12:OH, dans des proportions de 85: 1 0 5 respectivement, est efficace pour attirer des mdles de G. libertina Toutes les substances testCes attirent significativement plus de tordeuses ' Contribution No. 134 of the Atlantic Cool Climate Crop Research Centre, St. John's, Newfoundland. Corresponding author (email: hillier@biology.utah.edu). Present address: Department of Biology, University of Utah, 257 S 1400 E, Salt Lake City, Utah, United States 84112 657