Claim 1: the use of a herbicide composition which comprises as component a) acid 4 - (2,4-dichlorophenoxy) butanoic acid of formula (1) or their salts or Esters as a component (b) acid 3,6 Dichloro - 2 - metoxibenzoico formula (2) or their salts or esters, where the relationship Weight of the components (a) to (b) on the basis of equivalent acid is 1: 10 to 1: 100To control unwanted vegetation in crop plants. Claim 7: Use according to any one of claims 1 to 6, wherein the composition comprises at least one Pesticide (herbicide).Claim 8: the use according to claim 7, wherein the pesticide C extra is a selected herbicide glyphosate, glufosinate, clethodim and sethoxydim and fluazifop, quizalofop, imazamox, imazaquin, imazetapir, cloransulam, diclosulam, flumetsulam, clorimurona, tifen Sulfurona, acetochlor, metolachlor, dimethenamid, piroxasulfona lactofeno acifluorfen, fomesafen,,,Bentazone, cinmetilina, naptalam, flumiclorac, pendimethalin, trifluralin, ethalfluralin, tribenurona, metribuzin, Clomazone, flufenacet, saflufenacilo, trifludimoxazina, linurona diurone, paraquat, 2,4-d, diflufenzopyr, carfentrazone, flumioxazin, sulfentrazona, halosulfurona, iodosulfurona, M Esotriona, isoxaflutole, topramezone, tembotriona and biciclopirona.Claim 13: a method for controlling unwanted vegetation in crop plants, characterized in that it comprises Leave a composition is defined in any of claims 1 to 8 on plants, Seeds and / or their habitat.Reivindicación 1: El uso de una composición herbicida caracterizada porque comprende como componente A) ácido 4-(2,4-diclorofenoxi)butanoico de fórmula (1) o sus sales o ésteres y como componente B) ácido 3,6-dicloro-2-metoxibenzoico de fórmula (2) o sus sales o ésteres, donde la relación de peso de los componentes A) a B) sobre la base de equivalentes de ácido es de 1:12 a 1:100, para controlar la vegetación no deseada en las plantas de cultivo. Reivindicación 7: El uso de acuerdo con cualquiera de las reivindicaciones 1 a 6, caracter