N-benzoyl-N'-2,5-dihalo-4-perfluoroalkoxyphenylureas, pesticidal compositions containing them and their use in the control of pests

摘要

Novel substituted N-benzoyl-N'-2,5-dihalo-4- perfluoroalkoxyphenylureas of formula I ##STR1## in which R.sub.1 is hydrogen, fluorine, chlorine or bromine; R.sub.2 is fluorine or chlorine; each of R.sub.3 and R.sub.4 is fluorine, chlorine or bromine; and n is 2, 3, 4, 5, 6, 7 or 8, processes and intermediates for their prepraration, their use in pest control, and pesticidal compositions that contain at least one compound of formula I as active ingredient, are disclosed. The preferred field of application is the control of pests in and on animals and plants.