G. aurantiaca and hybrid Den. Phal with black spotting

[Salixx]

I couldn't find anything that stuck out at me that looked like this:





Photos are of my Guarianthe aurantiaca, but a very similar thing is happening to a Den. phal that I don't particularly care about.

The spots are dry and form circles on the back of the leaves. The front of the leaves have this weird spotting - I do believe the same thing is causing both. Maybe important to note: the new growth is not showing this.

This happened over the last few days. I have been distracted and not taking great care of my orchids. This one has been outside, with not much for water and temperatures going down to the low 40Fs.

So, I was hoping someone recognizes this. It looks vaguely viral to me (which I hope is not the case) but also could be fungal. The plant will be spending future nights inside the garage until I can figure this out. Eventually, I want to bring it inside but I obviously don't want to put my other plants at risk.

Thoughts? Is it fungal? Stress + fungal? The dreaded V word?

[rbarata]

Yesterday I saw something similar to this. Take a look here.

[Salixx]

The thing that looks similar on that page said it could be fungal. I'll treat the Catt. with Phyton and probably chuck the Dendrobium - it was a freebie, get's quite big and I didn't like it anyway (didn't choose to take it either, was sent with other stuff).

If the Phyton Clears it up, I'll have my answer. If not, I will probably discard the plant. I don't want to, but it's not extremely high on my "I love this plant" list.

Still open to suggestions if someone else has them!