5-acylamido-1-aryl-pyrazoles, composition containing them and herbicidal method of using them

A 5-acylamido-1-arylpyrazole of the formula ##STR146## in which R.sup.1 represents hydrogen, nitro, fluorine, chlorine, bromine or iodine,

• R.sup.2 represents hydrogen or straight-chain or branched alkyl having 1 to 12 carbon atoms,
• X represents oxygen or sulphur,
• Y represents oxygen, sulphur, a sulphinyl group or a sulphonyl group,
• A represents a straight-chain or branched, optionally singly or multiply, identically or differently, halo-substituted alkylene bridge having 1 to 6 carbon atoms,
• Ar.sup.1 represents phenyl, 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-pyrimidyl, 4-pyrimidyl, 5-pyrimidyl, 3-pyridazinyl, 4-pyridazinyl, pyrazinyl or s-triazinyl, each optionally substituted by at least one of halogen, cyano, nitro, in each case straight-chain or branched alkyl, alkoxy or alkoxy carbonyl having 1 to 4 carbon atoms in each of the alkyl parts, in each case straight-chain or branched haloalkyl or haloalkoxy having 1 to 4 carbon atoms and 1 to 9 identical or different halogen atoms in each case, or a --S(O).sub.m --R.sup.4 radical,
• R.sup.4 represents amino, in each case straight-chain or branched alkyl, alkylamino, dialkylamino or haloalkyl having 1 to 4 carbon atoms in each of the individual alkyl parts and, in the case of haloalkyl, having 1 to 9 identical or different halogen atoms and
• m represents a number 0, 1 or 2 and
• Ar.sup.2 represents phenyl, 2-pyridyl, 3-pyridyl or 4-pyridyl, each optionally substituted by those substituents mentioned for Ar.sup.1.