I got this Angraecum a couple years ago and it started getting these weird black spots so I sort of quarantined it and disowned it a little because I was afraid it would spread to my other orchids. Its still very alive, but now one of the leaves has this massive brown spot on it. Is this a disease? Virus? Infection? Or something environmental? Thank you.
Hope someone else has an answer. I grow a few Angraecoids, but haven't seen anything like this. Have you tipped the plant out of its pot to see what the roots look like? Also check out: Orchid Diseases