ailing Wilsonara Space Mine 'Red Rendezvous'

[Fran20]

Any ideas as to what is ailing this plant would be welcome:

[estación seca]

You probably didn't water it enough. Notice the pleating on the leaf in the back right of the first photo? That is characteristic of not enough water.

Oncidiums should never dry out. The new roots on developing growths especially should never dry out for long, or they, and the growth, die. In very large bark like that daily watering would probably be required.

It still may survive. It will look awful until it begins growing and grows some new roots. If you leave it in that pot with that medium, water every day. Put it in bright shade, and keep it as humid as possible. Keep it in the 70-75 F range. You could put it into small bark, or loosely packed sphagnum moss, which would keep the roots more moist. With those two medium choices you would water less frequently - but still never let it dry out.

A treatment with KelpMax might help.

[DirtyCoconuts]

it also might be too hot- when i try to make a cooler grower work somewhere they don't like i see this...lots of attempted growth that just seems to not make it.

[Rhonda Svoboda]

A couple of things: I agree with everyone else- it looks underwatered. Where do you live? What kind of light does it get? How often do you water?
Furthermore- rehydrate it. Repoting may be an option. cut off the dead roots and also- cut off any and all dead leaves and psuedobulbs as they are just sucking up resources- start off with a smaller, healthy plant

[Roberta]

Dead leaves and pseudobulbs don't suck resources. They are just unaesthetic. If a leafless pseudobulb is firm, leave it - it's a "reserve" for the plant while it grows new roots. If squishy, remove it since it probaably is a potential source of rot. The same with old roots... cut if you are sure it is dead, and it is squishy/slimy. But if the old velamin comes off easily leaving a stringy "core", that root core can, at the very least, help anchor the plant (really important that it doesn't wobble in its new medium) and may be able to passively help hydrate the plant too. My general practice is, if it isn't rotten, leave it, especially if you're trying to revive a plant that has issues. It needs all the reserves it can get.

[Fran20]

es:"It still may survive. It will look awful until it begins growing and grows some new roots. If you leave it in that pot with that medium, water every day. Put it in bright shade, and keep it as humid as possible. Keep it in the 70-75 F range."
Been following es' advice I've been watering daily and I must say the new growth is starting to look much better. A number of new roots are green. Maybe there is hope.

RS: "What kind of light does it get? How often do you water?"
It's been getting bright shade light and good humidity and air movement. I was watering twice a week. But following ES advice I've been watering daily.
Roberta:"My general practice is, if it isn't rotten, leave it, especially if you're trying to revive a plant that has issues. It needs all the reserves it can get."
I'm inclined to agree. Nothing is squishy or slimy so am just trying to disturb it as little as possible.
Thanks all for your input.