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Laboratory Evaluation of Amblyseius fallacis as a Predator of Tetranychid Mites

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The predacity of Amblyseius fallacis (Garman) in all motile stages was studied against all stages of Tetranychus yusti McGregor, T. desertorum Banks, and T. urticae Koch. The female of A. fallacis was the most efficient predator stage, consuming averages of 4.8 females or 16 protonymphs of the prey per day. Other predatory stages were less effective, but did contribute to the destruction of prey. Rate of predation generally increased as temperature was raised from 21.1° to 32.2°C. Females held at 26.7°C and subjected to a 10:14-hr light:dark cycle were significantly more efficient predators than individuals held at photoperiods of 24:0, 14:10, or 0:24 hours light:dark. A positive correlation exists between rate of oviposition and predation of tetranychid eggs; the highest rate occurs at 21.1°C with a 10:14-hour light:dark cycle.

Document Type: Research Article

Publication date: December 15, 1970

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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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