Sooty Mold on Desert Rose?
I have a desert rose that I think became infested with aphids or mealy bugs but it may have been another bug (it was at a relative's house). Whatever it was excreted honeydew (I think) and the now it is covered in sooty mold (I think).
Usually I can get the sooty mold off of plants by first killing the bugs and then using soap and fungicides (daconil) to kill the mold. I haven't tried neem oil yet, but I will try that tomorrow.
The plant is better but still quite a bit of stubborn black stuff on it. I guess it is possible that it is not sooty mold but if so, then what is it and why won't daconil or soap get rid of it?
I have rinsed the plant many times and let it dry in the sun so it is not for lack of rinsing.