Pyrimidine (4,6)diyl-bis-(thiono)(thiol)-phosphoric (phosphonic) acid esters of the formula ##STR1## in which R is alkyl with 1 to 6 carbon atoms, R.sub.1 is alkyl, alkoxy or alkylmercapto each with 1 to 6 carbon atoms or phenyl, R.sub.2 is alkyl, alkoxy or alkylmercapto each with 1 to 5 carbon atoms, hydrogen or phenyl, R.sub.3 is hydrogen, alkyl with 1 to 4 carbon atoms or halogen, and X is oxygen or sulfur, Which possess insecticidal and acaricidal properties.
式子为 ##STR1## 的
嘧啶(4,6)二基-双(
硫代
硫基)-
磷(膦)酸酯,其中R是1至6个碳原子的烷基,R.sub.1是1至6个碳原子的烷基、烷氧基或烷基
硫醇基或苯基,R.sub.2是1至5个碳原子的烷基、烷氧基或烷基
硫醇基、氢或苯基,R.sub.3是氢、1至4个碳原子的烷基或卤素,X是氧或
硫,具有杀虫和杀螨性能。