Requirement 1: methods for controlling plant breeding diseases in useful plants or their propagating materials, including the use of combinations of ingredients (a) and (b) for useful plants, their locations or their propagating materials,On the basis of synergism, component (a) is a formula compound (1), where R is hydrogen or thyroid； q is a residual formula (Q1) or (Q2),where R1 is hydrogen, halogen or C1-6 alkyl； R2 is hydrogen, halogen, C1-6 alkyl, C2-6 alkenyl, C3-6 alkynyl, C3-6 cycloalkyl-C3-6 alkynyl, halophenoxy, halophenyl-C3-6 alkynyl, C (C1-4 alkyl) = NO- C1-4 alkyl, C1-6 haloalkyl, C1-6 haloalkoxy, C2-6 haloalkenyl, or C2-6 haloalkenyloxy； R3 is hydrogen, halogen, C1-6 alkyl； R4, R5 and R6, independently of each other, are hydrogen, halogen or -º-R7； with the proviso that at least one of R4, R5 and R6 is different from hydrogen； R 7 is hydrogen, C 1-6 alkyl, C 1-6 haloalkyl or C 1-4 alkoxyalkyl； and R8 is hydrogen or methoxy；and salts / isomers / structural isomers / stereoisomers / diastereoisomers / enantiomers / tautomers and agrochemically acceptable N-oxides of said compounds； and component (B) is a compound selected from the group consisting of (B1) a strobilurin fungicide； (B2) an azol fungicide； (B3) a morpholine fungicide； (B4) an anilinopyrimidine fungicide； (B5) a fungicide selected from the group consisting of anilazine, arseniates, benalaxyl, benalaxil-M, benodanil, benomyl, bentiavalicarb, bentiavalicarb-isopropyl, biphenyl, bitertanol, blasticidin-S, bordeaux mixture, boscalide, bupirimium chloride captafol, captane, carbendazim, carbon disulfide, carboxine,Carbromid, Cedro flood oil, quinocationat, cloroneb, cloromet, clorotalonil, clozolinato, cinnamulldeho, copper, ammonium, copper hydroxide, octanoato de copper, cupric oleate, cupric sulfate, ciazofied, cimoximida, cimoxanil, diclofluanid, dicolona, diclopropeno, dicolomizina, dichlorano, dietencaferb, Difloumerm, dimitimol, dimitimol, dimetoroph, dinocap, ditianon, dodina, edifenfos
