I've been weeding in my flower bed the last couple of days and had noticed that one of my well established siberian irises was taking forever to come up; I thought it was odd, because there was pretty much 0 chance it winter killed. So today I looked at it more closely, it is coming up, but slowly. There seemed to be quite a bit of fine webbing on it. And after picking away for a few minutes I looked at my fingers; there was orangey stuff on them(squished mites I think)

Yuck. Should I try to control these, or am I better off digging out the plant and getting rid of it(sealed back to the dump I guess, or burn it) before it spreads to any more of my perennials? I'm terrified of an infestation, my sister had one another year and had a terrible time controling it after it got out of hand.