A process for combating fungi, wherein the fungi, or the materials, plants or seeds threatened by fungus attack, or the soil, are treated with a fungicidally effective amount of a compound of the formula ##STR37## where X is CH.sub.2, CH--C.sub.1 -C.sub.4 -alkyl, CH--C.sub.1 -C.sub.4 -alkoxy, CH--C.sub.1 -C.sub.4 -alkylthio or N-C.sub.1 -C.sub.4 -alkoxy,
- Y is O, S or NR.sup.5,
- R.sup.1, R.sup.2 and R.sup.5 are H or C.sub.1 -C.sub.4 -alkyl,
- Z.sup.1 and Z.sup.2 are identical or different and each is H, halogen, methyl, methoxy or cyano, n is an integer from 1 to 4, and
- R.sup.8 is, or, when n>1, the R.sup.8 's are identical or different and are each, H, halogen, cyano, nitro, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, substituted or unsubstituted phenyl, substituted or unsubstituted phenoxy, substituted or unsubstituted benzyloxy, or substituted or unsubstituted pyridyl-2, wherein the substituents are halo, cyano, methyl, or methoxy.