Methods for controlling weeds using synergistic compositions containing penoxsulam, triclopyr, and bispyribac, especially rice, sugarcane, cereal and grain crops, pastures, rangelands, industrial vegetation management (IVM), aquatics and turf, as well as protecting crops from herbicidal injury caused by any of the individual components. These methods provide improved post-emergence herbicidal weed control and reduce herbicidal injury by concomitant application of the mixture.