just thinking, if you happen to have a propane torch (ya know, for sweating pipes) might try quickly(and I mean QUICK!) brazing the plants with it, I'm certain it would cause instant death to all the mites, and wouldn't do as much damage to the plant as you may think (long as you dont stop moving the torch). I'd rather have slightly singed buds than infested, pesticide covered plants. Might try it on a houseplant first (to check damage control) YMMV, but Just a thought...