Gordon's Sedge Stop Nutsedge Killer Granules provide quick and reliable control of nutsedge and other listed sedges in your turf. This selective post-emergent herbicide is specially formulated for warm and cool-season grasses, with an easy-to-use granular formulation in a convenient shaker can. Pyrimisulfan is the primary active ingredient, and provides multi-season control on up to 500 sq ft.