Ortho 32 oz. Ready-to-Spray WeedClear Lawn Weed Killer Base. Kiills over 250 weeds without harming your lawn when used as directed. It works quickly, delivering results in hours, and is suitable for both Southern and Northern lawns. Active ingredients include Dimethylamine Salt of 2,4-D Acid 8.658%, Dimethylamine Salt of Mecoprop-p Acid 2.127%, and Dimcamba Acid 0.371.