Abstract
Of 19 compounds that were effective against adults and larvae of the stable fly Stomoxys calcitrans (L.), 4 had extremely low oral toxicities to rats or mice. These were SD-8949 (1-(2-bromo-4,5-dichlorophenyl)-2-chlorovinyl dimethyl phosphate), SD-8447 (2-chloro-1-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate), SD-8211 (2-chloro-1-(2,5-dichlorophenyl) vinyl dimethyl phosphate), and SD-8972 (1-(4-bromo-2,5-dichlorophenyl)-2-chlorovinyl dimethyl phosphate). Susceptibility of the insect to the different compounds was determined by spraying adults in a wind tunnel and exposing larvae in treated CSMA medium. An evaluation was made of 146 compounds against adults and 212 against larvae.
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