Characterization of a Strain Capable of Degrading a Herbicide Mixture of Quinclorac and Bensulfuronmethyl *1 *1 Project supported by the National Natural Science Foundation of China (Nos. 40501037 and 30570053) and the National Key Technologies Research and Development Program of China during the 11th Five-Year Plan Period (No. 2006BAJ08B01).