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) compound of formula (I) wherein R is hydrogen or methoxy； Q is (Q1) or (Q2)； R1is hydrogen, halogen or C1C6alkyl； R2 is hydrogen, halogen, C1C6alkyl, C2-C6alkenyl, C3-C6alkinyl, C3-C6cycloalkyl-C3-C6alkinyl, halophenoxy, halophenyl-C3-C6alkinyl, C(C1-C4alkyl)=NO-C1-C4alkyl, C1C6haloalkyl C1C6haloalkoxy, C2-C6haloalkenyl, or C2-C6haloalkenyloxy； R3 is hydrogen, halogen, C1C6alkyl； R4, R5 and R6, independently from each other, are hydrogen, halogen or -=-R7； with the proviso that at least one of R4, R5 and R6 is different from hydrogen； R7 is hydrogen, C1C6alkyl, C1C6haloalkyl or C1C4alkoxyalkyl； and R8 is hydrogen or methoxy； and agrochemically acceptable salts/isomers/structural isomers/stereoisomers/diastereoisomers/enantiomers/tautomers and 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.
