(Di)thio-phosphoric and -phosphonic acid derivatives, and their use in plant protection

摘要

Compounds of the formula I <IMAGE> (I) in which R denotes alkyl, R1 denotes alkyl, alkoxy, alkylmercapto, alkylamino or dialkylamino, R2 and R3 independently of one another denote H, alkyl, cycloalkyl, benzyl or furylmethyl, R4 denotes alkyl, alkoxymethyl, alkylmercaptomethyl or phenyl and X denotes oxygen or sulfur, have valuable insecticidal, acaricidal and nematocidal properties.