A fungicidal composition comprising N-tridecyl-2,6-dimethylmorpholine in combination with a compound selected from the group consisting of manganese ethylenebisdithiocarbamate, manganese zinc ethylenediaminebisdithiocarbamate and an ammonia complex of zinc-(N,N alkylenebisdithiocarbamate) and N,N'-polyethylene bis-(thiocarbamoyl)-disulfide which has a strong synergistic fungicidal action, and a process for controlling the spread of fungi, i.e. inhibiting the growth of fungi, with this composition.