Abstract: A herbicidal synergistic composition for controlling broad-leaved weeds and grasses in crops of useful plants resistant to protoporphyrinogen oxidase inhibitors, comprising, in addition to customary inert formulation auxiliaries, as active compounds a) a herbicide which inhibits the action of protoporphyrinogen oxidases and b) at least one further pesticide selected from the group consisting of co-herbicides, fungicides and insecticides/acaricides.