DAVID GRAYS Crab Grass & Clover Killer is a high powered selective lawn weed killer, able to select and kill just the weeds in your Couch, Bent and Fescue lawns. Higher powered selective herbicide, therefore will knock down harder-to-kill weeds. Spot Spray treatment only on Buffalo and Kikuyu Lawns, Some damage to these lawns should be expected. Always to be used as per the label instructions