Our lawn is being overrun with, what I think, is false kyllinga. We have large areas that are wet and smaller areas were water commonly runs, It has a yellowish/green color, grows about the same as our regular grass, unlike nut sedge, which we also have; it looks like miniature nut sedge, with the same shape to it's leaves. It's now sprouting their familiar little flower spurs. What would be the best way to get rid of it, and with what? I was told to use Roundup, a pre-emergence or Dismiss. Thanks