The invention relates to a herbicidally effective agent containing a mixture consisting of: (A) a herbicidally effective quantity of one or more compounds of formula (I), wherein R1 represents hydrogen, C¿1?-C4 alkyl, C3-C4 alkenyl, C3-C4 alkynyl C1-C4 haloalkyl; R?2¿ represents hydrogen, C¿1?-C10 alkyl, C1-C10 haloalkyl, C6-C10 aryl, C6-C10 haloaryl, C1-C6 alkylsulfonyl-C1-C4 alkyl, di(C1-C6 alkyl)phosphono-C1-C4 alkyl, tri(C1-C6 alkyl)silyl-C1-C4 alkyl), C2-C7 alkanoyl-C1-C4 alkyl, carboxy-C1-C4 alkyl, (C1-C6 alkoxy)carbonyl-C1-C4 alkyl, {[C3-C9 (α-alkylalkylidene)]iminooxy (C1-C6 alkoxy)carbonyl}-C1-C4 alkyl, (C3-C6 alkenyloxy)carbonyl-C1-C4 alkyl, (C3-C6 alkynyloxy)carbonyl- C1-C4 alkyl, (C3-C8 cycloalkyloxy)carbonyl-C1-C4 alkyl, phenoxy-C1-C4 alkyl, C3-C6 alkenyloxy-C1-C4 alkyl, C3-C8 cycloalkenyloxy-C1-C4 alkyl, C5-C8 cycloalkenyl, C6-C8 bicycloalkyl, C6-C8 bicycloalkenyl, C2-C7 cyanoalkyl or C3-C6 alkynyloxy-C1-C4 alkyl; R?3¿ represents hydrogen, halogen or cyano; R4 represents hydrogen or halogen; R5 represents hydrogen, halogen or C¿1?-C4 alkyl, and; R?6¿ represents C¿1?-C4 alkyl or C1-C4 haloalkyl, or together, R?5 and R6¿ form trimethylene or tetramethylene, and the corresponding enol ethers of the compound of formula (I), wherein R1 is different from hydrogen and C¿1?-C4 haloalkyl, as well as the salts of the compound of formula (I), wherein, R?1¿ represents hydrogen, and of; (B) an antidotally effective quantity of one or more safeners.