Fungicidal 1,4-disubstituted 1-azolyl-3,3-dimethylbutane derivatives of the formula ##STR1## in which R.sup.1 represents hydrogen or halogen,R.sup.2 represents hydrogen or halogen,R.sup.3 represents hydrogen, halogen or trifluoromethoxy,R.sup.4 represents halogen, trifluoromethoxy, trifluoromethylthio, trifluoromethylsulphinyl, trifluoromethylsulphonyl, difluoromethoxy, difluorochloromethoxy, trifluorochloroethoxy, tetrafluoroethoxy, trifluoroethoxy, difluoromethylthio, trifluorochloroethylthio, tetrafuoroethylthio, difluoromethylsulphinyl, difluorochloromethylsulphinyl, trifluorochloroethylsulphinyl, tetrafluoroethylsulphinyl, difluoromethylsulphonyl, difluorochloromethylsulphonyl, trifluorochloroethylsulphonyl, tetrafluoroethylsulphonyl, difluorobromomethylthio, difluorobromomethylsulphinyl, difluorobromomethylsulphonyl or difluorochloromethylthio orR.sup.3 and R.sup.4 together represent alkylenedioxy substituted by halogen,R.sup.5 represents hydrogen or halogen,A represents a keto group or a CH(OH) grouping,Z represents a nitrogen atom or the CH group andR.sup.6 and R.sup.7 identical or different and independently of one another represent hydrogen, alkyl, alkenyl, alkynyl, optionally substituted cycloalkyl, optionally substituted cycloalkylalkyl or optionally substituted phenylalkyl, whereR.sup.3 represents trifluoromethoxy whenR.sup.4 represents halogen,and addition products thereof with acids and metal salts.