The present invention provides a novel organophosphoric acid ester represented by the following formula, a process for its production and a pesticidal composition containing this ester as an active ingredient: ##STR1## where R.sup.1 is an alkyl group, R.sup.2 is an alkyl group or a thioalkyl group, each of R.sup.3, R.sup.4 and R.sup.5 is a hydrogen atom, a halogen atom, an alkylthio group, a nitro group, a cyano group, an alkyl group, an alkylsulfinyl group, an alkylsulfonyl group or a trifluoromethyl group, and X is an oxygen atom or a sulfur atom.
本发明提供了一种新颖的有机
磷酸酯,其
化学式如下,以及其制备方法和包含该酯为活性成分的
杀虫剂组合物:##STR1## 其中R.sup.1是烷基,R.sup.2是烷基或
硫代烷基,每个R.sup.3、R.sup.4和R.sup.5是氢原子、卤素原子、烷基
硫基、硝基、
氰基、烷基、烷基亚磺酰基、烷基磺酰基或三
氟甲基,X是氧原子或
硫原子。