I used some new Surge with sulfentrazone on some chickweed and some ground ivy on a vacant lot 2 weeks ago. Worked great. Killed some overwintering nutsedge, too. But then i noticed there wasn't much grass left. Does anybody have any information or experience regarding sulfentrazone, as Surge--or on carfentrazone as Speedzone or Quicksilver, regarding possible injury to the grass? Any ideas Tremor, Runner, Ric?