Herbicidal sulfonamides

A compound having the formula:

• ##STR120## wherein R.sub.1 is ##STR121## R.sub.3 and R.sub.6 are independently hydrogen, fluorine, chlorine, bromine, iodine, alkyl of 1-4 carbon atoms, alkoxy of 1-4 carbon atoms, nitro, trifluoromethyl, cyano, CH.sub.3 S(O).sub.n -- or CH.sub.3 CH.sub.2 S(O).sub.n --;
• R.sub.4 is hydrogen, fluorine, chlorine, bromine or methyl;
• R.sub.5 is hydrogen, fluorine, chlorine, bromine, methyl or methoxy;
• R.sub.7 is hydrogen, fluorine, chlorine, bromine, alkyl of 1-2 carbon atoms or alkoxy of 1-2 carbon atoms;
• R.sub.8 is hydrogen, methyl, chlorine or bromine;
• R.sub.9 and R.sub.10 are independently hydrogen, methyl, chlorine or bromine;
• W and Q are independently oxygen or sulfur;
• n is 0, 1 or 2;
• X is hydrogen, chlorine, bromine, methyl, ethyl, alkoxy of 1-3 carbon atoms, trifluoromethyl, CH.sub.3 S-- or CH.sub.3 OCH.sub.2 --;
• and Z is methyl or methoxy;
• or an agriculturally suitable salt thereof;
• provided that:
• (a) when R.sub.5 is other than hydrogen, at least one of R.sub.3, R.sub.4, R.sub.6 and R.sub.7 is other than hydrogen and at least two of R.sub.3, R.sub.4, R.sub.6 and R.sub.7 must be hydrogen;
• (b) when R.sub.5 is hydrogen and all of R.sub.3, R.sub.4, R.sub.6 and R.sub.7 are other than hydrogen, then all of R.sub.3, R.sub.4, R.sub.6 and R.sub.7 must be either chlorine or methyl;
• and
• (c) when R.sub.3 and R.sub.7 are both hydrogen at least one of R.sub.4, R.sub.5 or R.sub.6 must be hydrogen.