Appeared overnight!!!!!!

[AnonYMouse]

Yes, take it out of the wet weather. Let the affected area dry out, bacteria and fungi thrive in moisture!

And add alcohol (reduce water) to your mix.

[imationkarl]

I've dealt with this on dendrobiums a number of times and I think finally eradicated it in my collection a year ago. I'm fairly certain it's a bacteria. I treated it with spraying physan on the plants.

physan 20:
Physan 20 | Planet Natural