The present invention relates to herbicidally active compositions, which comprise 3-[5-(difluoromethoxy)-1-methyl-3-(
trifluoromethyl)pyrazol-4-ylmethylsulfonyl]-4,5-dihydro-5,5-dimethyl-1,2-
oxazole [
common name pyroxasulfone] and at least one herbicide B which is an inhibitor of the
electron transfer in
photosynthesis and which is selected from the groups of: b.1 arylurea herbicides; b.2 triazin(di)one herbicides; b.3
terbuthylazine; b.4 pyridazinone herbicides; b.5 phenylcarbamate herbicides; b.6
nitrile herbicides; b.7 bentazone and its salts such as bentazone
sodium; and b.8 methylthiotriazine herbicides. The invention furthermore relates to the use of a composition as defined herein for controlling undesirable
vegetation in crops which, by
genetic engineering or by breeding, are resistant to one or more herbicides and / or pathogens, such as
plant-pathogenous fungi, and / or to
attack by insects; preferably resistant to one or more herbicides that act as inhibitor of the
electron transfer in
photosynthesis. The invention furthermore relates to a method for controlling undesirable
vegetation, which comprises applying an herbicidal composition according to the present invention to the undesirable plants. Application can be done before, during and / or after, preferably during and / or after, the emergence of the undesirable plants. The herbicide A and the at least one herbicide B can be applied simultaneously or in succession.