O-(Methyl or ethyl)-S-(propyl or butyl)-O-alkyl-(thio/sulfinyl/sulfonyl)-methylphenyl-thiophosphates
 Thiophosphoric acid phenyl esters of the formula ##STR1## wherein R represents alkyl with 1 to 2 carbon atoms, R.sub.1 represents alkyl with 3 to 4 carbon atoms, R.sub.2 represents alkylthio with 1 to 4 carbon atoms, alkylthiomethyl with 1 to 4 carbon atoms, alkylsulfinyl with 1 to 4 carbon atoms, alkylsulfinylmethyl with 1 to 4 carbon atoms, alkylsulfonyl with 1 to 4 carbon atoms, alkylsulfonylmethyl with 1 to 4 carbon atoms, --S(CH.sub.2).sub.m CN, --S(CH.sub.2).sub.m Cl, SCF.sub.3 ##STR2## R.sub.3 represents C.sub.1 to C.sub.4 alkyl, R.sub.4 and R.sub.5 each represents hydrogen or C.sub.1 to C.sub.4 alkyl, m is 1 or 2, n is 0, 1 or 2, and X represents alkyl with 1 to 4 carbon atoms or halogen, a process for their manufacture and their use in pest control. 
Ciba-Geigy Corporation
C A
C07F A01N
inventional inventional
Alexis A. Paul L.
Oswald Valint