When chemical and microbial insecticides were evaluated in replicated small-plot field tests on cotton at Stoneville, MS, in 1975-77, differences in control of Heliothis spp. and resultant yields reflected the infestation pressure. With heavy infestations, the synthetic pyrethroids, permethrin and fenvalerate, and a new carbamate, UC-51762 (dimethyl N,N'- [thiobis [(methylamino) carbonyloxy]] bisethanimidothioate), gave the most effective control and the greatest increases in yield compared with untreated checks. The biological inseticides, Bacillus thuringiensis Berliner, Baculovirus heliothis, a looper (Autographa) NPV, and Nomuraea rileyi (Farlow) Samson were ineffective as a group and, in some cases, no more effective than no treatment. The organophosphate materials, either the standards or new materials, were intermediate in effectiveness between the synthetic pyrethroids and the biological insecticides.
Document Type: Research Article
Publication date: August 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.