Insecticidal compounds of the formula: ##STR1## in which A is chloro and B is hydrogen or A and B are both fluoro, X is oxygen or sulfur and one of R.sup.1 and R.sup.2 is or includes an optionally substituted 5-membered heteroaryl ring, their method for preparation and formulation, insecticidal compositions thereof, and their use to control insects, are disclosed and exemplified.
公式为:##STR1##其中A为
氯,B为氢或A和B都是
氟,X为氧或
硫,R.sup.1和R.sup.2中的一个包括一个可选择取代的5-成员杂环芳基环,揭示并且举例其制备和配方方法,
杀虫剂组合物,以及它们用于控制昆虫的用途。