Bonide Weed Beater ULTRA Weed Control is the ultimate systemic broadleaf weed killer for lawn and turf. It is effective on over 200 hard to kill weeds. See visible results in just 24 hours! Reseed in just 2 weeks! Superior cool weather performance extends application window to early spring and to late fall, when weeds are most susceptible. Active ingredients: MCPA 2-ethylhexyl ester, Mecoprop-p acid, Dicamba acid, Carfentrazone-ethyl.