Cyclohexenone oxime ethers and their use as herbicides

A cyclohexenone oxime ether of the formula I ##STR595## where R.sup.1 is C.sub.1 -C.sub.6 -alkyl;

• A is C.sub.2 -C.sub.6 -alkylene or C.sub.3 -C.sub.6 -alkenylene, where these groups may carry from one to three C.sub.1 -C.sub.3 -alkyl groups or halogen atoms;
• Z is a 5-membered heteroaromatic structure having from one to three hetero atoms selected from the group consisting of three nitrogen atoms and one oxygen or sulfur atom
• a 6-membered heteroaromatic structure having from one to four nitrogen atoms;
• X is an amino group --NR.sup.a R.sup.b, where
• R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.3 -C.sub.6 -alkenyl or C.sub.3 -C.sub.6 -alkynyl
• R.sup.b is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl, C.sub.1 -C.sub.6 -acyl or benzoyl, where the aromatic ring may additionally carry from one to three of the following substituents:
• nitro, cyano, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio and C.sub.1 -C.sub.4 -haloalkyl, or X is nitro, cyano, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, alkylthio, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, carboxyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, benzyloxycarbonyl or phenyl, where the aromatic radicals may additionally carry from one to three of the following substituents:
• nitro, cyano, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, carbonyl, C.sub.1 -C.sub.4 -alkoxycarbonyl or benzyloxycarbonyl,
• n is from 0 to 3, or from 1 to 4 where Z is halogen-substituted pyridyl, and
• R.sup.2 is C.sub.1 -C.sub.4 -alkylthio-C.sub.1 -C.sub.6 -alkyl;
• C.sub.1 -C.sub.4 -alkylthio-C.sub.3 -C.sub.7 -cycloalkyl phenyl substituted by three C.sub.1 -C.sub.4 -alkyl groups, or its agriculturally useful salts and esters of C.sub.1 -C.sub.10 -carboxylic acids and inorganic acids.