Compositions comprise a mixture of: (A) N-(2-chloro-thiazol-5-ylmethyl)-N'-methyl-N''-nitroguanidine (I); and (B) a fungicide. Novel compositions comprise a mixture of: (A) N-(2-chloro-thiazol-5-ylmethyl)-N'-methyl-N''-nitroguanidine of formula (I): and (B) a fungicide other than cyclopropyl carboxamide derivatives and azolylmethyl cycloalkanes. [Image] ACTIVITY : Fungicidal; insecticidal. MECHANISM OF ACTION : None given.