As far as I know, I have never seen a pest damage an orchid, with one exception. For some reason I see (rarely) mealy bugs on Phal. but no other orchid genera is ever involved. Is this something others have seen? The mealy bugs are easy to eradicate but still, I just wonder why they seem to only attack the Phal. I don't seem to have aphid or white fly problems and I think it is because of my liberal use of fans and my liberal use of those blue and bright yellow sticky strips.
Though this has nothing to do with orchids, I have on occasion seen scale on a jade plant but not adjacent tropical plants.