Got this NOID from Trader Joes and didn't see the tiny black spots until I got it home. Dropped a leaf but is otherwise OK. Lives next to many other plants in GH. What should I do with it?
I've heard of many people complaining about black spots on Oncidiums (particularly Sharry Baby) - I think it's often just a normal characteristic of those plants and not a disease.
I notice you've entitled "poss spider mite" - doesn't look like spider mite to me - that's usually underneath the leaves and silvery. A sure-fire test for them is to wipe a damp cloth (white) along the bottom of the suspect leaf(s); you'll get rusty red-brown streaks on the cloth if it's spider mites.
I have read that some of the odontoglossum orchids have small spots. It is just how they are. Some of mine get that and other crosses are entirely clear. I think the more odontoglossum it has, the more chance of spotting.