Application of ultra-low-volume (ULV) sprays of malathion and methyl parathion to cotton plants yielded more persistent residues than when the compounds were applied as emulsifiable concentrates. Half-life values for ULV malathion on plants held at 29.4°C and 40.6 °C were 21 and 15 hours, respectively. With emulsifiable concentrate (EC) malathion, the half-life values were ap proximately 1/2 those for ULV. Although comparable formulations of methyl parathion dissipated at least twice as fast as malathion, the persistence of F.C malathion was equaled when methyl parathion was applied as ULV.
Document Type: Research Article
Publication date: April 1, 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.