Disclosed is a composition comprising (a) cyanodithiocarbimate of Formula (I) wherein X is a halogen and R is a C1-C14 alkyl group, and (b) at least one second microbicide selected from 1,4-bis(bromoacetoxy)-2-butene, 2-(thiocyanomethylthio)benzothiazole, a methylene-bis(thiocyanate), 2-bromo-4-hydroxyacetophenone, N-dodecylmorpholine, iodopropargyl butyl carbamate, propiconazole, 4,5-dichloro-2-N-octyl-4-isothiazolin-3-one, 2-Noctyl-4-isothiazolin-3-one, a bis-quaternary ammonium salt, p-chloro metacresol, ophenylphenol, diidomethyl p-tolyl sulfone, diiodomethyl p-chlorophenyl sulfone, or bronopol. Also disclosed is a method of controlling the growth of at least one microorganism in or on a product, material, or medium susceptible to attack by a microorganism, the method comprising adding to the product, material, or medium the composition. Further disclosed is a method for preventing spoilage of a product, material, or medium caused by microorganism selected from bacteria, fungi, algae, or mixtures thereof, wherein the method comprises adding to the product, material, or medium the composition.