Also try hosing down the plants whenever you're near them with the hose in hand, Donald. If it is mites causing the curled leaves, just dousing the leaves with water can keep them at bay. I used to fret and sweat over my Brugs which absolutely are the favorite plant of mites. Now I just make sure to hose them down if it doesn't rain and haven't had any mite damage this year at all.
I honestly wouldn't worry about the mites moving to other plants - when I had Brugs inside my pool cage they attracted all the mites so I had no problems on my orchids. I need to move another Brug in there as a 'sacrificial lamb' because the orchids are starting to see some mite problems again. They are the only plants I ever have mite problems with, and now that I've been hosing them regularly, not much of that either. I can't hose off the orchids as often as I'd like because they need to dry out between waterings which gives the mites the dry, hot conditions they love.
