Agricultural pyridinesulfonamides

A compound of the formula:

• ##STR91## R.sub.1 is H, Cl, Br, F, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, COOR.sub.5, NR.sub.6 R.sub.7 or SO.sub.2 NR.sub.10 R.sub.11 ;
• R.sub.2 is H, Cl, Br or CH.sub.3 ;
• R.sub.3 and R.sub.4 are independently H or CH.sub.3 ;
• R.sub.5 is C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 alkenyl, CH.sub.2 CH.sub.2 OCH.sub.3, CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.3, CH.sub.2 CH.sub.2 CH.sub.2 OCH.sub.3 or CH.sub.2 CH.sub.2 Cl;
• R.sub.6 and R.sub.7 are independently CH.sub.3 or CH.sub.3 CH.sub.2 ;
• R.sub.6 and R.sub.7 can be taken together to form --(CH.sub.2).sub.4 --, --(CH.sub.2).sub.5 -- or --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 --;
• R.sub.10 and R.sub.11 are independently CH.sub.3 or CH.sub.3 CH.sub.2 ;
• W is oxygen or sulfur;
• X is CH.sub.3, --OCH.sub.3 or --OCH.sub.2 CH.sub.3 ;
• Y is H, Cl, CH.sub.3, CF.sub.3, --NHCH.sub.3, --N(CH.sub.3).sub.2 --, --CH.sub.2 OR.sub.8, --CH.sub.2 CH.sub.2 OR.sub.8, --OCH.sub.2 CF.sub.3 or VR.sub.9 ;
• Z is CH;
• V is oxygen or sulfur;
• R.sub.8 is CH.sub.3 or CH.sub.3 CH.sub.2 ;
• or
• R.sub.9 is CH.sub.3, CH.sub.3 CH.sub.2, CH.sub.2 CO.sub.2 R.sub.8, CH.sub.2 CH.sub.2 OR.sub.8, C(CH.sub.3)HCO.sub.2 R.sub.8 or CH.sub.2 CH.sub.2 CO.sub.2 R.sub.8 ;
• and agricultural salts thereof;
• providing that:
• R.sub.1 is at the 2- or 4-position of the pyridine ring.