Dichloroacetamides, herbicides containing acetanilides as herbicidal active ingredients and the dichloroacetamides as antagonists, and the use of these herbicides in controlling undesired plant growth

A herbicidal agent containing, as herbicidal active ingredient, an effective amount of at least one acetanilide of the formula ##STR43## where R.sup.7 is hydrogen or linear or branched alkyl or alkoxy of up to 5 carbon atoms,

• R.sup.8 is hydrogen, halogen or linear or branched alkyl or alkoxy of up to 5 carbon atoms,
• R.sup.9 is hydrogen, halogen or linear or branched alkyl or alkoxy of up to 5 carbon atoms,
• R.sup.7 together with R.sup.8 may also be alkylene of up to 6 carbon atoms which is ortho-linked to the benzene ring and is unsubstituted or substituted by linear or branched alkyl of up to 4 carbon atoms,
• X is chlorine or bromine and
• A is alkoxy or alkoxyalkyl of up to 4 carbon atoms, or is an azole radical which is bonded via a ring nitrogen and which may be monosubstituted or polysubstituted by halogen, phenyl, alkyl, alkoxy, alkylthio or perfluoroalkyl, each of up to 4 carbon atoms, cyano, carboxyl or alkoxycarbonyl, where alkoxy is of up to 4 carbon atoms, and may also be a salified azole radical if the azole ring contains 2 or 3 nitrogens,
• and, as antagonist, an effective amount of at least one dichloroacetamide of the formula ##STR44## where R.sup.1 is hydrogen, methyl or ethyl,
• R.sup.2 and R.sup.3 are identical or different and are hydrogen, methyl or methoxy,
• R.sup.4 is hydrogen or methyl and
• R.sup.5 and R.sup.6 are identical or different and are hydrogen or methyl, and
• m is 0 or 1, n is 1 or 2, p is 0, 1 or 2 and q is 0, 1 or 2.