Laboratory and field trials to determine the antifeedant/deterrent efficacy of guazatine triacetate in reducing feeding damage by Plathypena scabra (F.) to soybeans were conducted in 1976–78. Short-term (48 h) laboratory and field dosage/respone equations were calculated. Both equations were tempered by the presence of foliar phytotoxicity thresholds as they approached 86 and 50% protection, respectively. Short-term mortality was nominal at all rates, although mortality increased as exposure time (>48 h) and application rate increased. Increased application rates depressed development in a curvilinear fashion. The total cumulative damage eventually sustained, under each treatment, varied inversely with application rate. No effective systemic antifeedant/deterrent action was indicated.
Document Type: Research Article
Publication date: October 1, 1979
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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.