A method of controlling phytopathogenic diseases on useful plants or on propagation material thereof, which comprises applying to the useful plants, the locus thereof or propagation material thereof a combination of components A) and B) in a synergistically effective amount, wherein component A) is a compound of formula (I) wherein R1 is CF2H or CF3； R2 is methyl or ethyl； R3 is hydrogen or chloro； and R4 is hydrogen or cyclopropyl； and agronomically acceptable salts/isomers/enantiomers/tautomers/N-oxides of those compounds； and component B) is a compound selected from compounds known for their fungicidal and/or insecticidal activity, is particularly effective in controlling or preventing fungal diseases of useful plants.
