| abstract |
Disclosed are compounds of formula (1), their N-oxides and agriculturally suitable salts, which are useful for controlling undesirable vegetation. Wherein A, R 1 , R 2a , R 2b , W, Y and Z are as defined in the disclosure. Also disclosed are compositions containing the compound of formula (1) and methods of controlling undesired vegetation, comprising contacting the vegetation or its environment with an effective amount of the compound of formula (1). . |