A composition comprising at least a pyridylethylbenzamide derivative ofgeneral formula (I) (a) and a compound capable of inhibiting the methioninebiosynthesis (b) in a (a) / (b) weight ratio of from 0.01 to 20. A compositionfurther comprising an additional fungicidal compound. A method forpreventively or curatively combating the phytopathogenic fungi of crops byusing this composition.