Phenylene-bis(O,S-dialkylthiophosphates)
 Thiolphosphoric acid esters of the formula ##STR1## wherein R.sub.1 represents methyl or ethyl, PA1 R.sub.2 represents propyl or butyl, PA1 R.sub.3 is a radical having the formula: ##STR2## or ##STR3## IN WHICH R.sub.4 represents allyl, methallyl, --CH.sub.2 CN, or ##STR4## R.sub.5 represents hydrogen, halogen, C.sub.1 -C.sub.5 -alkyl, nitro, cyano, methylmercapto or C.sub.1 -C.sub.5 carboalkoxy, PA1 R.sub.6 represents hydrogen, halogen, C.sub.1 -C.sub.5 -alkyl or --COCH.sub.3, PA1 X represents oxygen or sulphur, and PA1 m and n each denote the number 1 or 2, process for their production and their use in the control of pests. 
Ciba-Geigy AG
A C C
A01N C07F C07F
inventional inventional inventional
Paul L. Alexis A.
Valint, Jr. Oswald