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ANALYSIS OF THE IMPACT OF ABAMECTIN ON LIRIOMYZA TRIFOLII (BURGESS) (DIPTERA: AGROMYZIDAE)

Published online by Cambridge University Press:  31 May 2012

M.P. Parrella*
Affiliation:
Department of Entomology, University of California, Riverside, California, USA92521
K.L. Robb
Affiliation:
Department of Entomology, University of California, Riverside, California, USA92521
J.K. Virzi
Affiliation:
Department of Entomology, University of California, Riverside, California, USA92521
R.A. Dybas
Affiliation:
Merck, Sharp & Dohme Research Laboratories, Division of Merck & Co., Inc., Hillsborough Rd., Three Bridges, New Jersey, USA08887
*
1 Author to whom correspondence should be addressed.

Abstract

The effect of abamectin on the leafminer, Liromyza trifolii (Burgess), was investigated using topical applications, leaf dips, and repellency bioassays. Topical application of technical material in acetone to susceptible adult females provides an LD50 value of 0.404 ppm. Leaf-dip assays using abamectin formulated in water with third-instar larvae gave an LC50 value of 0.386 ppm. These data provide baseline information on the toxicity of this material to L. trifolii and are important in the development of resistance management programs. Adult female leaf miners were repelled from feeding and ovipositing on chrysanthemum plants treated with formulated abamectin up to 7 days after foliar application in choice and no-choice assays. The implications of these data in managing populations of L. trifolii are discussed.

Résumé

L’effet de l’abamectine sur la mineuse Liriomyza trifolii (Burgess) a été étudié par application topicale, par trempage de feuilles minées et par un test de répulsion. L’application topicale du produit de grade technique dilué dans l’acétone à des femelles adultes susceptibles a révélé une LD50 de 0,404 ppm. Le trempage de feuilles minces par des larves de stade trois dans une formule aqueuse d’abamectine a révélé une LC50 de 0,386 ppm. Ces données fournissent des informations de base sur la toxicité de ce produit envers L. trifolii, et permettront l’élaboration de programmes de régie fondée sur la résistance. Les femelles adultes ont refusé de s’alimenter et de pondre sur des plants de chrysanthème traités avec une formule d’abamectine jusqu’à 7 jours après l’application foliaire, et ce aussi bien avec que sans choix. On discute des implications de ces résultats pour la régie de L. trifolii.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1988

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