Relative Susceptibility of Five Stored-Product Moths1 to Some Organophosphorus Insecticides2,3

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The relative susceptibility of the almond moth (AM), Cadra Cautella (Walker); Indiao-meal moth (IMM), Plodia interpunclella (Hübner); Mediterranean flour moth (MFM) , Anagasta huchniella (Zeller); raisin moth (RM) , Cadra figulilella (Gregson); and tobacco moth (TM) , Ephestia elutella (Hübner); to each of 12 organ- ophosphorus insecticides was determined by direct application of spray solutions to adult insects. Various degrees of differences in susceptibility were observed among and the range of differences varied with insecticides.

The order of species susceptibility at LC~, to each insecticides tested was: Abate ®(O,O-dimethyl phosphorothioate O,O-diester with 4,4'-thiodiphenol), MFM> AM>TM>RM>IMM; Bay 77488 (O,O-diethyl phosphorothioate O-ester with phenylglyoxylonitrile oxime) ,AM= AFM>IMM>TM>RM; Bay 78182 >(O,O-diethyl phosphorothioate O-ester with o-chlorophenyl) glyoxylonitrile oxime), AM>IMM>TM>RM>MFM; C-9491 (0- (2,5-di- chloros-4-iodophenyl) O,o-dimethyl phosphorothioate), AM>TM>MFM>RM>IMM: diazinon, MFM>TM>AM= IMM>RM; dicapthon, MFM>TM>RM>IMM>AM; dimoth chlorvos, MFM>IMM>TM>RM>AM; Dursban® (O,O- diethyl 0-3,5,6-trichloro-2-pyridyl phosphorothioate), MFM>AM>RM>TM>IMM; fenitrothion (Bay 41831) (O,O-dimethyl o-4-nitro-m-tolyl phosphorothioate), MFM>RM>AM>TM>IMM; fenthion, IMM>IMM>AM> TM>AM>RM; Gardona® (2 - chloron 1- (2,4,5- trichlorospecies, phenyl) vinyl dimethyl phosphate), MFM>IMM>AM>

Using a basis of 1 for the most toxic compound, the order and rank in relative effectiveness of insecticides indicated by ratios calculated from LC95 values obtained for the least susceptible of the 5 species of moths to each of the insecticides tested were: dichlorvos, 1.0; Bay 77488, 2.4; Bay 78182, 3.9; Dursban, 7.6; diazinon, 8.0; fenthion, 8.3; malathion, 9.2; fenitrothion, 13.9; Gardona, 47.5; C-9491, 58.7; dicapthon, 362.3; and Abate, 47.1.

Document Type: Research Article

Publication date: October 1, 1969

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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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