Many branches have died. I have a greenish gray scaly something on the bark. I also noticed it on some of our trees. I bought an oil fungicide last year but only sprayed it once. Is this killing my plants? And what is the solution?
I'm sorry your Azalea is being attacked! It sounds like it could be Azalea Bark Scale but you may have to compare some pictures to be sure.
These articles may help you: