Herbicidal pyridyl sulfonamides

A compound of the formula:

• ##STR46## wherein ##STR47## W.sub.1 is O or S;
• R is H or CH.sub.3 ;
• R.sub.1 is NO.sub.2, F, Cl, Br, CF.sub.3, C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.2 alkyl substituted with OCH.sub.3 or OC.sub.2 H.sub.5, SO.sub.2 N(CH.sub.3)R.sub.10, S(O).sub.n R.sub.11, S(O).sub.n CF.sub.2 H, S(O).sub.n CF.sub.3, OR.sub.12, OSO.sub.2 R.sub.11, CH.sub.2 CH.sub.2 Cl, C(O)R.sub.25, ##STR48## R.sub.2 is H, C.sub.1 -C.sub.2 alkyl, C.sub.1 -C.sub.2 alkoxy, C.sub.1 -C.sub.2 alkylthio, C.sub.1 -C.sub.2 alkylsulfinyl, C.sub.1 -C.sub.2 alkylsulfonyl, C.sub.1 -C.sub.2 haloalkyl or halogen;
• R.sub.3 is Cl, SO.sub.2 CH.sub.3, SO.sub.2 N(CH.sub.3).sub.2, OCH.sub.3, NO.sub.2 or N(CH.sub.3).sub.2 ;
• R.sub.6 is CO.sub.2 R.sub.9, S(O).sub.n R.sub.11, C.sub.1 -C.sub.3 alkyl, Cl, Br or SO.sub.2 N(CH.sub.3).sub.2 ;
• R.sub.7 is S(O).sub.n R.sub.11, OSO.sub.2 R.sub.11, C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 alkoxy or Cl;
• R.sub.9 is C.sub.1 -C.sub.3 alkyl, CH.sub.2 CH=CH.sub.2, CH.sub.2 CH.sub.2 Cl or CH.sub.2 CH.sub.2 OCH.sub.3 ;
• R.sub.10 is C.sub.1 -C.sub.3 alkyl or OCH.sub.3 ;
• R.sub.11 is C.sub.1 -C.sub.3 alkyl;
• R.sub.12 is C.sub.1 -C.sub.3 alkyl, CH.sub.2 CH.sub.2 OCH.sub.3, C.sub.3 -C.sub.4 alkenyl, C.sub.3 -C.sub.4 alkynyl or C.sub.1 -C.sub.3 alkyl substituted with 1-3 atoms of Cl or F, or with 1 Br;
• R.sub.13 is H or CH.sub.3 ;
• n is 0, 1 or 2;
• A is ##STR49## W is CN;
• X is CH.sub.3, OCH.sub.3, OC.sub.2 H.sub.5, CH.sub.2 OCH.sub.3, Cl, CH.sub.2 OH, NHCH.sub.3 or N(CH.sub.3).sub.2 ;
• Y is CH.sub.3, OCH.sub.3, OC.sub.2 H.sub.5 or Cl;
• Z is CH;
• R.sub.25 is H or C.sub.1 -C.sub.2 alkyl;
• and their agriculturally suitable salts;
• provided that
• X and Y cannot simultaneously be Cl.