Herbicidally active phenoxyalkanecarboxylic acid derivatives

A herbicidal composition comprising a herbicidally effective amount of a compound of the formula:

• ##STR49## Q.sup.1 is CH or N;
• R is H or C.sub.1 -C.sub.5 alkyl;
• X is H, halogen, CF.sub.3, or NO.sub.2 ;
• Y is H or halogen;
• Z is --O-- or --NH--;
• A is ##STR50## wherein Q.sup.2 Q.sup.3 are each CH or N;
• R.sup.1 and R.sup.2 are each H, C.sub.1 -C.sub.5 alkyl;
• C.sub.1 -C.sub.5 alkoxy, or C.sub.2 -C.sub.6 alkoxycarbonyl;
• R.sup.3, R.sup.4, and R.sup.5 are each H or C.sub.1 -C.sub.5 alkyl;
• R.sup.6 is H, halogen, or C.sub.1 -C.sub.5 alkyl;
• R.sup.7, R.sup.8, R.sup.9, and R.sup.10 are each H or C.sub.1 -C.sub.5 alkyl;
• R.sup.11 is H, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, C.sub.2 -C.sub.6 alkenyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.15 aryloxyalkyl, or C.sub.7 -C.sub.15 aralkyl;
• V.sup.1 and V.sup.2 are each H, halogen, NO.sub.2, CN, or CF.sub.3 ;
• V.sup.3 is halogen or CF.sub.3 ;
• W.sup.1 is --O-- or --NH--;
• W.sup.2 is --(CH.sub.2).sub. n -- wherein n is 0 or 1, or --CO--;
• and X.sup.1 is halogen;
• or salt thereof, with the proviso that at least one of Q.sup.1, Q.sup.2 and Q.sup.3 is nitrogen.

A method for killing weeds or plants other than rice, wheat or barley, said method comprising applying a compound of the formula:

• ##STR56## wherein Q.sup.1 is CH or N;
• R is H or C.sub.1 -C.sub.5 alkyl;
• X is H, halogen, CF.sub.3, or NO.sub.2 ;
• Y is H or halogen;
• Z is --O-- or --NH--;
• A is ##STR57## R.sup.1 are each H, C.sub.1 -C.sub.5 alkyl;
• C.sub.1 -C.sub.5 alkoxy, or C.sub.2 -C.sub.6 alkoxycarbonyl;
• R.sup.3, R.sup.4, and R.sup.5 are each H or C.sub.1 -C.sub.5 alkyl;
• R.sup.6 is H, halogen, or C.sub.1 -C.sub.5 alkyl;
• R.sup.7, R.sup.8, R.sup.9, and R.sup.10 are each H or C.sub.1 -C.sub.5 alkyl;
• R.sup.11 is H, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, C.sub.2 -C.sub.6 alkenyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.15 aryloxyalkyl, or C.sub.7 -C.sub.15 aralkyl;
• V.sup.1 and V.sup.2 are each H, halogen, NO.sub.2, CN, or CF.sub.3 ;
• V.sup.3 is halogen or CF.sub.3 ;
• W.sup.1 is --O-- or --NH--;
• W.sup.2 is --(CH.sub.2).sub.n -- wherein n is 0 or 1, or --CO--;
• and X.sup.1 is halogen;
• or salt thereof, to a crop comprising rice, wheat or barley in an effective amount to kill weeds or plants other than rice, wheat or barley, with the proviso that at least one of Q.sup.1, Q.sup.2 and Q.sup.3 is nitrogen.

The method for killing weeds or plants other than rice, wheat or barley, as claimed in 13, wherein Q.sup.1 is CH or N;

• R is H or C.sub.1 -C.sub.5 alkyl:
• X is CF.sub.3 ;
• Y is chloro;
• Z is --O-- or --NH--;
• A is ##STR62## wherein Q.sup.1 is CH or N;
• V.sup.3 is CF.sub.3 or halogen.