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 R1 IS HYDROGEN, HALOGEN OR C1-C6ALKYL； R2 IS HYDROGEN, HALOGEN, C1-C6ALKYL, C2-C6ALKENYL, C3-C6ALKINYL, C3-C6CYCLOALKYL-C3-C6ALKINYL, HALOPHENOXY, HALOPHENYL-C3-C6ALKINYL, C(C1-C4ALKYL)=NO-C1-C4ALKYL, C1-C6HALOALKYL, C1-C6HALOALKOXY, C2-C6HALOALKENYL, OR C2-C6HALOALKENYLOXY； R3 IS HYDROGEN, HALOGEN, C1-C6ALKYL； 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, C1-C6ALKYL, C1-C6HALOALKYL OR C1-C4ALKOXYALKYL； 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.
