Active agent as a herbicide that contains a mixture of an active amount as a herbicide of one or more compounds of the ** formula ** in which V is a radical selected from the set of (V1) to (V4), having the symbols e Indices the following meanings: R is hydrogen, (C1-C4) alkoxycarbonyl, halo (C1-C4) alkoxycarbonyl, (C1-C4) alkyl-sulfonyl, (C1-C4) -sulfinyl alkyl, (C1-alkyl) -C4) -thio, COH, cyano: R1 is hydrogen, (C1-C4) alkyl, (C2-C4) alkenyl, (C2-C4) alkynyl, (C3-C8) cycloalkyl, (C3-C8) cycloalkenyl, alkyl (C1-C4) -Cycloalkyl (C3-C8), halo-cycloalkyl (C3-C7), alkyl (C1-C4) -thio-cycloalkyl (C3-C8), halo-alkyl (C1-C8) or halo-alkenyl (C2-C8); R2 is hydrogen, (C1-C4) alkyl, (C1-C4) alkoxy, halo (C1-C4) alkyl, halogen, halo (C1-C4) alkoxy, cyano, nitro; R3 is hydrogen, (C1-C4) alkyl, (C2-C4) alkenyl, (C2-C4) alkynyl.Agente activo como herbicida que contiene una mezcla de una cantidad activa como herbicida de uno o varios compuestos de la **fórmula** en la que V es un radical seleccionado entre el conjunto de (V1)a(V4), teniendo los símbolos e índices los siguientes significados: R es hidrógeno, alcoxi (C1-C4)-carbonilo, halo-alcoxi (C1-C4)-carbonilo, alquil (C1-C4)-sulfonilo, alquil (C1-C4)-sulfinilo, alquil (C1-C4)-tio, COH, ciano: R1 es hidrógeno, alquilo (C1-C4), alquenilo (C2-C4), alquinilo (C2-C4), cicloalquilo (C3-C8), cicloalquenilo (C3-C8), alquil (C1- C4)-cicloalquilo (C3-C8), halo-cicloalquilo (C3-C7), alquil (C1-C4)-tio-cicloalquilo (C3-C8), halo-alquilo (C1-C8) o halo-alquenilo (C2-C8); R2 es hidrógeno, alquilo (C1-C4), alcoxi (C1-C4), halo- alquilo (C1-C4), halógeno, halo-alcoxi (C1-C4), ciano, nitro; R3 es hidrógeno, alquilo (C1-C4), alquenilo (C2-C4), alquinilo (C2-C4).