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THE EFFECT OF A NEEM (AZIDIRACHTA INDICA) BASED INSECTICIDE ON SURVIVAL AND DEVELOPMENT OF JUVENILE WESTERN CHERRY FRUIT FLY (RHAGOLETIS INDIFFERENS) (DIPTERA: TEPHRITIDAE)

Published online by Cambridge University Press:  31 May 2012

E.J. vanRanden
Affiliation:
Centre for Pest Management, Simon Fraser University, Vancouver, British Columbia, Canada V5A 1S6
B.D. Roitberg
Affiliation:
Centre for Pest Management, Simon Fraser University, Vancouver, British Columbia, Canada V5A 1S6

Abstract

In the laboratory a proprietary, neem-based insecticide formulation (NBI) was evaluated as a potential pest management tool for the western cherry fruit fly, Rhagoletis indifferens Curran (WCFF). NBI was tested for its potential effects on survival and development of juvenile WCFF. Incorporation of NBI into an artificial larval diet resulted in a decrease in the formation of pupae and subsequent adult emergence. Late third instar larvae exposed to NBI in sand were able to form puparia; however, the numbers of adults and pupae developing inside the puparia were decreased at concentrations as low as 0.05% NBI. Well-timed root drenches with NBI could control R. indifferens by disrupting pupation. Applied in this manner, NBI may provide cherry orchardists with an effective, new control tactic.

Résumé

Au laboratoire une formulation d’un insecticide à base de margousier (NBI) a été évaluée comme outil potentiel pour la lutte dirigée contre la mouche des cerises (WCFF), Rhagoletis indifferens Curran. Les effets du NBI sur la survie et le développement des WCFF juvéniles ont été étudiés. Le NBI incorporé à une diète artificielle pour les larves a causé une diminution du nombre de pupes formées, ainsi que du nombre d’adultes. Les larves exposées au NBI dans le sable à la fin du troisième stade larvaire ont formé des coques de nymphose; par contre, des concentrations aussi faibles que 0,05% NBI ont fait diminuer le nombre de pupes et d’adultes qui se sont développées à l’intérieur des coques de nymphose. Un traitement de NBI par bassinage des racines au moment opportun pourrait aider à lutter contre R. indifferens en interrompant la pupaison. Appliqué ainsi, le NBI pourrait procurer aux producteurs de cerises une nouvelle méthode de contrôle efficace.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1998

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