Fence line treatment is an effective way to control broadleaf weeds. Southern Ag Amine 2,4-D Fence Line Weed Control is a highly effective herbicide for multiple species of broadleaf weeds and Brushtox contains triclopyr, a systemic herbicide that controls broadleaf weeds. Professional weed killers can also be added to Roundup or glyphosate for long-term weed control. Correcting improper management practices to maintain a dense, vigorous turf is the best and most lasting method for broadleaf weed control. The active ingredient in some products such as Iron HEDTA is bad news for broadleaf weeds but safe to use on grass. Southern Ag 2,4-D kills weeds that ruin the look of your hard-earned beautiful lawn.