I was diagnosed a few months after the roundup, as soon as I got back from Florida. It's fine. I'm on a Qvar regimen and it's working really well so far. I'm still healthy as a horse.
We don't get powdery mildew here, except on old ramblers, which have no resistance to anything whatsoever. I'm gradually replacing all of my Dorothy Perkins ramblers with Super Dorothy, which looks just like Dorothy Perkins but never gets mildewed and reblooms constantly, unlike Dorothy Perkins, which blooms only once a year.
