.alpha.-(4-Biphenylyl)-benzyl-azolium salts of the formula ##STR1## in which A is CH or N,R.sup.1 and R.sup.2 each independently is hydrogen, alkyl or optionally substituted phenyl,R.sup.3 is hydrogen, alkyl or optionally substituted phenyl, phenylalkyl, phenylcarbonyl or phenylcarbonylalkyl,m is 0, 1, 2, 3, 4 or 5,X each independently is halogen, alkyl, halogenoalkyl, alkoxy, alkylthio, nitro or cyano,n is 0, 1, 2, 3, 4 or 5,Y each independently is halogen, alkyl, halogenoalkyl, alkoxy, alkylthio, nitro, cyano or phenyl which is optionally substituted by halogen, alkyl, halogenoalkyl, alkoxy, alkylthio, nitro or cyano, andZ is the anion of an inorganic or organic acid,are used to combat fungi.