Spectracide Weed Stop For Lawns For St. Augustine & Centipede Lawns Concentrate, Ready-to-Spray, 32-Ounce, 6-Pack KILLS THE WEEDS, NOT THE LAWN: For use on all varieties of St. Augustinegrass and centipedegrass  kills the weeds, not the lawn when used as directed. KILLS ESTABLISHED WEEDS: Including dollarweed, sandspur and Florida betony (see product label for complete list). CONTROLS WEEDS FROM SEEDS: Prevents weeds from emerging in the lawn. QUICKFLIP HOSE-END SPRAYER: Attaches easily to your garden hose and activates at the flip of a switch. MONEY-BACK GUARANTEE: Guaranteed results or your money back  see product label for details.