Clee...."sedge" doesnt give enough information....Basically you probably hae either yellow or purple nutsedge or BroomSedge...they are totally different.

If you have Nutsedge, then its probably a wet area....Great place to plant Chufa...Chufa is related.

If its Broomsedge, then you can't spray it away but you can eliminate it by applying Lime to get soil up to test and apply phosphate...Broomsedge is a sign that PH is out of wack and Phosphate levels are low.