In 1957, 92 to 85% control of the imported cabbageworm, Pieris rapae (L.), the diamondback moth, Plutella maculipennis (Curt.), und u DDT-resistant strain of the cabbage looper Trichoplusia ni (Hbn.), on late cabbage was obtained with four applications of the following insecticides; 1% endrin dust at 0.25 lb. of toxicant per acre, 2½% Guthion dust at 0.75 lb., and Phosdrin emulsible concentrate at 0.75 lb. The cabbage looper was not controlled with four applications of the following: 1% parathion dust at 0.33 lb. of toxicant per acre, 3% DDT dust at 1.0 lb., 4% malathion dust at 1.0 lb., 5% toxaphene dust at 1.5 lb., and 1% rotenone dust at 0.33 lb. In 1956, the eight insecticides gave 97 to 87% control of the imported cabbageworm and the diamondback moth, populations of the cabbage looper being almost negligible. Comparison of present and past effectiveness of DDT did not suggest development of strains of the imported cabbageworm resistant to this material.
Document Type: Research Article
Publication date: April 1, 1959
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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.