Abstract: Herbicides are of the formula ##STR1## wherein W is fluoro, bromo, chloro or CF.sub.3,each of X and X.degree. is independently H, fluoro, chloro, bromo, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, CF.sub.3 or nitro,Z and Z.sub.1 are independently oxygen or sulfur, with the proviso that at least one is oxygen,each of Y and Y.degree. is independently H, fluoro, chloro, bromo, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, CF.sub.3 or nitro,R.sub.1 and R.sub.4 are independently H, C.sub.1 -C.sub.4 alkyl and --COOR.sub.5 wherein R.sub.5 is H or C.sub.1 -C.sub.4 alkyl,R.sub.2 and R.sub.3 are independently H, C.sub.1 -C.sub.5 alkyl, fluoro, chloro, bromo or hydroxy, andR and R.degree. are independently H or C.sub.1 -C.sub.3 alkyl or both together form a covalent bond or an epoxy bridge (--O--),with the further proviso that no two adjacent ring members in either Rings A or B are from the group of t-butyl, t-butoxy and CF.sub.3.