1-Azolyl-2-aryl-3-fluoro-alkan-2- ols of the general formula I in which Az is 1H-1,2,4-triazole, 4H-1,2,4-triazole or 1H-imidazole; Ar is an unsubstituted or substituted aromatic radical from the series comprising phenyl, biphenyl, phenoxyphenyl and naphthyl; R1 is hydrogen, C1-C4-alkyl, C3-C5-alkenyl or benzyl; R2 is hydrogen, fluorine or C1-C6-alkyl and R3 is hydrogen, fluorine, C1-C6-alkyl, C1-C6-haloalkyl, C1-C6-alkoxy, C1-C6-alkylthio, phenyl, phenoxy, phenylthio or C3-C7-cycloalkyl, and each aromatic substituent or aromatic moiety of a substituent is unsubstituted or mono- or poly-substituted by halogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkyl, nitro and/or cyano; including the acid addition salts, quaternary azolium salts and metal complexes, are useful for controlling phytopathogenic microorganisms.