Field tests were conducted to evaluate the performance of selected insecticide treatments against the beet armyworm, Spodoptera exigua (Hubner), and the bollworm complex, Heliothis zea (Boddie) and H. virescens (F.), on cotton. Fenvalarate, profenofos, sulprofos, acephate, and methomyl were effective against S. exigua; toxaphene plus methyl parathion was ineffective. Treatments and rates (kg AI/ha) producing a significant yield increase over the treated standard, toxaphene + methyl parathion (2.24-4.48+ 1.12−2.24), were profenofos (0.84), fenvalarate (0.11), and permethrin (0.22). A highly significant correlation existed between degree of Heliothis spp. control and yield, but no correlation existed between beet armyworm control and yield. The following treatments and rates (kg AI/ha) provided significant Heliothis spp. control (larval population reduction) compared to the treated standard: fenvalarate (0.11 and 0.22), permethrin (0.22), fenvalarate + amitraz (0.06+0.21), fenvalarate + methomyl (0.06+0.25), sulprofos + amitraz (0.84+0.28), American Cyanamid AC 222705 (0.06−0.11), Dow Dowc0417 (0.11), and Ciba-Geigy CGA 74055 (0.11).
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.