Scotts Bonus S Southern Weed & Feed. Kills dollarweed and other common lawn weeds. Feeds and strengthens against heat and drought. Feeds grass and crowds out weeds. Apply when weeds are actively growing. Only for use on St. Augustine grass (including Floratam), centipede, zoysia, and carpetgrass lawns. Not for use on Bermudagrass. Active ingredient: Atrazine.