Substituted oxime ethers and fungicides which contain these compounds

A process for combating fungi, wherein the fungi, or the materials, plants, seed or the soil threatened by fungus attack are treated with a fungicidally effective amount of a substituted oxime ether of the general formula I ##STR13## where R.sup.1 is C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.4 -alkynyl, C.sub.1 -C.sub.6 -haloalkyl, C.sub.3 -C.sub.6 -haloalkenyl, C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -cycloalkyl, C.sub.3 -C.sub.6 -cycloalkyl-C.sub.1 -C.sub.4 -alkyl, cyano-C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxycarbonyl-C.sub.1 -C.sub.6 -alkyl, aryl-C.sub.1 -C.sub.6 -alkyl, pyridyl-C.sub.1 -C.sub.6 -alkyl, thienyl-C.sub.1 -C.sub.6 -alkyl aryl-C.sub.3 -C.sub.6 -alkenyl or aryloxy-C.sub.1 -C.sub.6 -alkyl, it being possible for the aromatic, pyridyl on thienyl ring to be substituted by one or more of the following:

• C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.2 -haloalkyl, C.sub.3 -C.sub.6 -cycloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.2 -haloalkoxy, halogen, aryl or aryloxy,
• R.sup.2 and R.sup.3 are identical or different and are hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.2 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.2 -haloalkoxy, halogen, cyano or nitro,
• R.sup.4 is hydrogen, C.sub.1 -C.sub.6 -alkyl or aryl, it being possible for the aromatic ring to be substituted by one or more of the following:
• C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.2 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.2 -haloalkoxy, halogen, cyano or nitro, and
• X is CH or N.