Toxicity of Seven Alkyl Organophosphorus Insecticides to the Boll worm,1 Pink Boll worm,2 and Tobacco Bud worm1 and Persistence of Naled in Various Formulations on Cotton leaves3,4

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Trichlorfon and Bay S-2217 (2-choroethyl methyl (2,2,2-t richloro-I-hydroxyethyl) phosphonate) were about equally toxic to larvae of the tobacco bud worm, Heliothis virescens (F,) , and trichlorfon and ethyl trichlorfon (diethyl (2,2,2- trichloro- 1 - bydroxyethyl) phosphonate) were equally toxic to larvae of the boll worm, H.zea (Boddie). However, trichlorfon was more toxic to tobacco bud worms when it was applied a an ultra low volume spray (ULV,1/2 gal or less per acre without water) than when it was used as a conventional spray (CLV, more than 1/2 g-al per acre with water). Vapors of dichlorvos from impregnated wafers killed all moths of the pink boll worm, Pertinophora gossypiella (Saunders), within 24 hours for 19 days. The ULV sprays of naled formulated with some adjuncts maintained 57% or more of the applied naled on the surface of cotton leaves for 24 hours, but none remained on the surface more than 2 hours when the naled was applied as a CLV spray.

Document Type: Research Article

Publication date: October 1, 1972

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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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