Provided herein are synergistic herbicidal compositions containing (a) a compound of formula (I): or an agriculturally acceptable salt or ester thereof and (b) triazolopyrimidine sulfonamides, including, but not limited to, cloransulam-methyl, diclosulam, florasulam, flumetsulam, metosulam, penoxsulam, and pyroxsulam. The compositions provide control of undesirable vegetation, e.g., in direct-seeded, water-seeded and transplanted rice, cereals, wheat, barley, oats, rye, sorghum, corn/maize, sugarcane, sunflower, oilseed rape, canola, sugar beet, soybean, cotton, pineapple, pastures, grasslands, rangelands, fallowland, turf, tree and vine orchards, aquatics, plantation crops, vegetables, industrial vegetation management (IVM) and rights of way (ROW).COMPOSICIÓN HERBICIDA QUE COMPRENDE ÁCIDO 4-AMINO-3-CLORO-5-FLUORO-6-(4-CLORO-2-FLUORO-3-METOXIFENILO) PIRIDINA-2-CARBOXÍLICO O UN DERIVADO DEL MISMO Y UN DERIVADO DE SULFONAMIDAS DE TRIAZOLOPIRIMIDINA; Y MÉTODO PARA CONTROLAR VEGETACIÓN INDESEABLE.