ProForce Duke 100WG 100g Post-emergent HerbicideOur ProForce Duke 100WG Herbicide contains 100g kg of the active ingredient Iodosulfuron methyl sodium and will be your secret weapon this season to keep the weeds at bay. Our ProForce Duke 100WG Herbicide is a dependable grass and broadleaf weed control herbicide that will keep your turf in tip top condition all year round. It works to both suppress and kill weed varieties seeding in your turf. Turf: Only apply to Kikuyu, buffalo grass or couchgrass