A synergistic microbicidal composition comprising: (a) at least one microbicide selected from the group consisting of a monosubstituted phenol and an isopropyl methyl phenol; and (b) at least one microbicide selected from the group consisting of substituted cyclohexyl propyl-1,3-diols, propen-2yl-methyl cyclohexanols and menthadiene alcohols.
