Disease or infection on Oncostele Midnight Magic

[JScott]

I had this plant, it was pretty big, and I loved it. It was growing in two different directions, with the main lead, and then a second lead consisting of to small mature pseudobulbs coming from the back of the plant.

The two biggest pseudobulbs in the middle of the plant started showing signs of disease. Fortunately, I have not have to deal with disease much in my collection, so I have no idea what this is. I have never seen it before. I love this plant, and I didn't know what to do, so I unpotted it and removed the two affected pseudobulbs (there was no brown in the rhizome indicating that it was spreading to the healthy growths), but that left me with a front division of a single mature pseudobulb, and then a tiny back division consisting of two small, seedling sized mature bulbs.

I potted the healthy parts separately, and they have already started to show new growths. And just for the sake of science, I potted the two diseased bulbs and kept them quarantined, and that is starting to show new growth too. Does anybody know what this is? Did I overreact by splitting the plant up? Is there something less invasive I could have done?I panicked and did the first thing I thought of, because I've lost Oncidium type plants very quickly to an aggressive rot that spreads so fast, by the time I notice something is wrong, it's already too late.

I think it's going to be fine. That large front division should recover quickly, and it may even bloom on the next growth or two, and that little back division will give me a cute little plant to trade. I'm not sure what to do with the diseased division that seems to be growing anyway. What do you guys thing? Did i do the right thing, or did I tear apart a plant that didn't need to be torn apart?