Triazolylphosphorus compounds of the formula ##STR1## wherein R.sub.1 represents C.sub.1 -C.sub.5 -alkyl, cyclopentyl, cyclohexyl or unsubstituted phenyl, R.sub.2 represents C.sub.1 -C.sub.5 -alkoxy or phenoxy, R.sub.3 represents C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.5 -alkoxy or C.sub.1 -C.sub.5 -alkylthio, R.sub.4 represents C.sub.1 -C.sub.5 -alkyl, and X represents oxygen or sulfur, and their use in pest control.
该公式中的Triazolylphosphorus化合物为 ##STR1## 其中R.sub.1代表C.sub.1-C.sub.5-烷基,环戊基,环己基或未取代的苯基,R.sub.2代表C.sub.1-C.sub.5-烷氧基或苯氧基,R.sub.3代表C.sub.1-C.sub.5-烷基,C.sub.1-C.sub.5-烷氧基或C.sub.1-C.sub.5-烷基
硫基,R.sub.4代表C.sub.1-C.sub.5-烷基,X代表氧或
硫,以及它们在害虫控制中的应用。