2013 was a rough year for Nutsedge in the Pittsburgh area. I am guessing that the record rainfall in June & July had something to do with it. I even noticed Yellow Nutsedge popping up in lawns (including my own) that I have never seen it in before. I had all of my technicians flag (Real Green Software) the lawns that have Yellow Nutsedge problems EVERY YEAR. I have just over 100 of those lawns. In the past, we have hit these lawns with Manage or Dismiss and eventually got the Nutsedge under control. Next season, I want to try and be more proactive. I've been reading online about FMC's Echelon and their claim of pre-emergent success with Nutsedge. I am thinking about trying it just for the 100 or so customers. Anyone tried it? Success? Fail?