A synergistic mixture of penoxsulam and glufosinate-ammonium controls weeds in crops, e.g., vineyards, orchards, perennial plantation crops, rice, corn, cereals, sorghum, soybeans, cotton, sunflower, oilseed rape, vegetables, turf, range and pashire, industrial vegetation management (rVM), rights-of-way and in any glufosinate-ammonium and/or ALS (acetolactate synthase)- tolerant crops.