Use IMAGE Herbicide Nutsedge Concetrate Weed Killer to give your lawn the look you've always wanted without the weeds. It is a post-emergent, selective weed killer for use in southern turf grass and selected ornamentals. IMAGE herbicide targets the toughest southern weeds, including yellow and purple nutsedge, dollar weed, wild onion and annual blue grass. Contains a patented ingredient that starves weeds to death.