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 microtubule assembly. The invention furthermore relates to the use of a composition as defined herein for controlling undesirable vegetation in crops. When using the compositions of the invention for this purpose the herbicide A and the at least one herbicide B can be applied simultaneously or in succession in crops, where undesirable vegetation may occur.本發明係關於除草活性組合物,其包含3-[5-(二氟甲氧基)-1-甲基-3-(三氟甲基)吡唑-4-基甲基磺醯基]-4,5-二氫-5,5-二甲基-1,2-噁唑[通用名派羅克殺草碸(pyroxasulfone)]及至少一種可作為微管組裝抑制劑之除草劑B。本發明另外係關於本文所定義組合物控制作物中不期望植物之用途。在使用本發明組合物來達成此目的時,除草劑A及至少一種除草劑B可同時或依次施加至可能存在不期望植物之作物處。