Laboratory screening tests showed the following pesticides to have activities equal to or better than carbaryl against young Porthetria dispar (L.) larvae: Dursban® (O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate), diazinon, dimethrin, Shell SD-8530 (3,4,5-trimethylphenyl methylcarbamate), SD-9098 (O-[2-chloro-1- (2,5-dichloro- phenyl) vinyl] O,O-diethyl phosphorothioate) , Mobil MC -A-600 (benzo [b) thien-4-yl methylcarbamate) , and tetramethrin. Large-acreage aerial spray comparisons of triehlorfon ULV at 1 pound per quart per acre with carbaryl at 1 pound per gallon were very effective. Dead and live larval counts and postspray egg mass counts all indicated good control in the 569-acre trichlorfon spray block. Three similar size blocks sprayed with carbaryl showed generally good control, but in all cases areas with living larvae could still be found. Dursban demonstrated poor control in six 40-acreplots, both when sprayed alone at 2 oz per acre, and in combination with malathion at the rate of 1oz Dursban and 7 oz malathion per acre. Poor control also was shown in a 20-acre plot treated with 4 oz of Zectran® (4-dimethylamino-3,5-xylyl methylcarbamate) per acre
Document Type: Research Article
Publication date: February 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.