Dual II MAGNUM® SI is a corn and soybean herbicide specially formulated for impregnation on dry fertilizer. It provides long-lasting control of most annual grasses and some small-seeded broadleaf weeds. The active ingredient, S-metolachlor, provides superior grass control that lasts two to four weeks longer than other grass herbicides. The added safener, Benoxacor, protects against crop injury even in cool, wet conditions. Dual II MAGNUM SI may be followed on corn acres with Callisto® herbicide in the spring for an outstanding two-pass program.