Cyromazine Effects on the Reproduction of Anastrephaludens (Diptera: Tephritidae) in the Laboratory and in the Field

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The effects of cyromazine on the adult Mexican fruit fly, Anastrepha ludens (Loew), include mortality and reduced fecundity and survival of the F1 generation. Dosage-dependent mortality was recorded for concentrations from 0.125 to 16%. Neonate to 2-d-old females fed an artificial diet with 5% cyromazine were incapable of laying eggs in fruit with a resistance of penetration> 11 newtons. Laboratory observations showed that treated females could not insert their ovipositor into grapefruit rind. When the same females were given a soft substrate (parafilm membrane), they laid significantly fewer eggs than control females. The F1 generation of treated females developed significantly less in an artificial larval diet and in grapefruit in the field. A field test showed that grapefruit from treatments made with 5% cyromazine-NuLure mixture had significantly fewer larvae per fruit than the control. This difference did not occur with fruit from a 5% malathion treatment.

Document Type: Research Article

Publication date: February 1, 1994

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  • 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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