The direct toxicity of the fungicide benomyl to eggs and immature stages of a predatory mite Amblyseius fallacis (Garman) was assessed by residue and slide-dip test methods. The effect on the predators resulting from ingestion of benomyl-treated two spotted spider mites, Tetranychus urticae Koch, also was evaluated. Benomyl was moderately ovicidal and considerably more toxic to immature predators by residual contact than by direct contact. Secondary poisoning through the prey caused permanent depression of oviposition. This effect was negatively correlated with the length of time that predators were exposed to the treated frey. Due to the moderate to severe toxic effect of benomyl on various life stages of A. fallacis, this compound should not be applied to apple trees at times when predators are controlling prey mites.
Document Type: Research Article
Publication date: October 1, 1974
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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.