I've been ignoring this problem for a while now, but since it seems to have spread, I figured I'd try to get some help identifying it. Just like the title says, my singalana Tujuh has developed a strange rash, which began at the stem, and has since spread to the leaves. I'm quite nervous about it, because I have it in my rack, growing quite closely together with some rare and expensive species. Quarantine time?
Anyway, I haven't been able to find anything quite like it on google, so I thought I'd ask.