Fungicidal compounds having the formula: ##STR1## wherein: R.sup.1 is selected from the group consisting of F, Cl, Br, CF.sub.3, a phenyl, a C.sub.1 -C.sub.2 alkoxy, a C.sub.1 -C.sub.2 haloalkoxy, an alkylthio, and a haloalkylthio radical, in which the halogen is F, Cl, or Br;R.sup.2 is selected from the group consisting of H, F, Cl, Br, and CF.sub.3 ;R.sup.3 is H, a C.sub.1 -C.sub.4 alkyl or a C.sub.3 -C.sub.6 cycloalkyl radical;Y is selected from the group consisting of H, CH.sub.3, OH, CN, and F;n is 1, 2, 3, 4 with the proviso that Y is OH when n is 1;m is 0 or 1;X is O or S;Rf is selected from the group consisting of C.sub.1 -C.sub.5 polyfluoroalkyl, C.sub.2 -C.sub.4 polyfluoroalkenyl, polyfluoroalkoxyalkyl and polyfluoroalkoxyalkenyl radicals, each one of them containing at least two fluorine atoms and, optionally, other halogen atoms selected from the group consisting of Cl and Br; andZ is CH or N.