Thanks, ewest. That was very helpful, and it looks like there are a lot of options available. Temps are to plummet this weekend, so I think I'll just wait till next year and stable temps.

Poppy, it pretty much covered my neighbor's small pond, so I knew I'd get it sometime. It's just a little frightening how much it spread in just one season despite our efforts to keep it in check. Until this year, I have had little trouble w/FA. The primrose is good cover, and I wouldn't mind having some of it. I just want to control it.

CMM, mistakes are part of the learning experience. I always seem to learn more from mistakes than I do successes. May I ask what systemic you used? I'm resigned to having this vegetation and will spot treat it just so it doesn't take over everything.