Effect of a Neem (Azidirachta indica) ‐Based Insecticide on Oviposition Deterrence, Survival, Behavior and Reproduction of Adult Western Cherry Fruit Fly (Diptera: Tephritidae)

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In the laboratory and in a cherry orchard, a proprietary, neem-based insecticide formulation was evaluated as a potential pest management tool for the western cherry fruit fly, Rhagoletis indifferens Curran. The insecticide was tested for its potential effects on oviposition, survival, behavior, and reproduction. Using adult R. indifferens, we found evidence for slight oviposition deterrence in the field, but this effect was not duplicated in the laboratory. No behavioral changes were observed in adult flies exposed to the insecticide under field conditions. A strong negative effect on the development of eggs and decreased survival of adults was seen when flies ingested the insecticide extract with food and water immediately after eclosion. Total suppression of egg development was obtained in adults exposed continuously to concentrations of the insecticide >0.5%. By delaying the onset of exposure to the insecticide, egg development was increased, and was not significantly different from controls. Applied as a foliar spray at the appropriate time within a cherry orchard, this neem-based insecticide may prevent adult female R. indifferens from maturing viable eggs and decrease adult survival.

Document Type: Research Article

Publication date: February 1, 1998

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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