A herbicidal composition comprising 1 - (4,6-dimethoxypyrimidin-2-yl) - 3 - (3 - trifluoromethyl - 2 - piridilsulfonil) urea (flazasulfuron () or its Salt and 2 - (2 - dimetoxipirimidin - 4.6 - ilcarbamoilsulfamoii) - n, N - (dimetilnicotinamida nicosulfuron or (b)) salt, and a method for controlling unwanted plants Using such a composition.Una composición herbicida que comprende 1-(4,6-dimetoxipirimidin-2-il)-3-(3-trifluorometil-2-piridilsulfonil)urea (flazasulfuron (A)) o su sal y 2-(4,6-dimetoxipirimidin-2-ilcarbamoilsulfamoiI)-N,N-dimetilnicotinamida (nicosulfuron (B)) o su sal, y un método para controlar plantas no deseadas que utilizan dicha composición.