The additives and vectors were selected and optimized for being used in the formulation of 20% bensulfuron-methyl·pretilachlor water dispersible granule.Preparations were performed within the product processing methods.Disintegration,suspension rat and wetting dispersion before and after the heat storage of 20% bensulfuron-methyl·pretilachlor water dispersible granule were measured.Based on these experimental results,a better formula was obtained.At last,the heat storage stability of the resulted preparatio...