Trap response of cutworm moths (Abagrotis orbis) to a sex-attractant lure in grape vineyards
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چکیده
Larvae of Abagrotis orbis (Grote) (Lepidoptera: Noctuidae) are climbing cutworms and can damage grapevines, Vitis vinifera L. (Vitaceae), in early spring by consuming expanding buds. A sex attractant would be useful for monitoring this insect in commercial vineyards. (Z)-7-Tetradecenyl acetate and (Z)-11-hexadecenyl acetate were found in extracts of female abdominal tips. In multiple field experiments, male A. orbis were captured in traps baited with a combination of these two chemicals but not in traps baited with either chemical alone. Males were trapped from mid-September to early October in south-central Washington and south-central British Columbia. Other noctuid moths (Mamestra configurata Walker, Xestia c-nigrum (L.), and Feltia jaculifera (Guenée)) were also captured in traps baited with the A. orbis pheromone and may complicate the use of this lure to monitor A. orbis. Abagrotis discoidalis (Grote) was captured in traps baited with (Z)-7-tetradecenyl acetate but not in traps baited with the two chemicals together. Résumé—Les larves d’Abagrotis orbis (Grote) (Lepidoptera : Noctuidae) sont des chenilles grimpantes qui peuvent endommager les vignes, Vitis vinifera L. (Vitaceae), au début du printemps lorsqu’elles consomment les bourgeons. Un attractant sexuel serait probablement utile pour la détection de cet insecte dans les vignes à échelle commerciale. L’acétate de (Z)-7tétradécényle et l’acétate de (Z)-11-hexadécényle ont été détectés dans les extraits d’extrémité d’abdomen de femelles. Au cours de plusieurs expériences sur le terrain, les males d’A. orbis ont été capturés dans les pièges munis du mélange de ces deux composés chimiques, mais non pas dans les pièges munis de ces composés présentés séparément. Les mâles ont été capturés de miseptembre à début octobre dans le centre sud de l’état de Washington, États-Unis, et dans le centre sud de la province de Colombie-Britannique, Canada. D’autres papillons nuisibles de Noctuidés (Mamestra configurata Walker, Xestia c-nigrum (L.) et Feltia jaculifera (Guenée)) ont aussi été capturés dans les pièges munis de la phéromone d’A. orbis, ce qui pourrait compliquer l’utilisation de ce piège à phéromone pour la détection d’A. orbis. Abagrotis discoidalis (Grote) a été capturée dans les pièges munis d’acétate de (Z)-7-tétradécényle, et n’a pas été capturée dans les pièges munis du mélange des deux composés chimiques. Received 4 July 2009. Accepted 18 November 2009. Corresponding author (e-mail: [email protected]). doi: 10.4039/n09-063 135 Can. Entomol. 142: 135–142 (2010) E 2010 Entomological Society of Canada
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