Small area at moment, just on branches. No spots on leaves.
It looks like a type of lichen, which is harmless. It doesn't need to be removed. Here is more:
Log in or sign up to help answer this question.
You must be logged into your account to answer a question.
If you don't have an account sign up for an account now.
Learn FromYour Peers onOur Blog
Friend's Email Address
Your Email Address