Azalea and Ash Tree: lichen or fungus?

My azaleas are suffering with what appears to be lichen. I have tried cutting off the affected branches but more are affected. The adjacent ash tree also has branches affected similarly but still sprouts leaves. Please advise me what to do. Photo attached.

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1 Comment To "Azalea and Ash Tree: lichen or fungus?"

#1 Comment By BushDoctor On 11/29/2017 @ 9:40 pm

You will be chasing your tail trying to control this. These are lichens, and will not harm your tree in any way! This article will help: https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm ^[1]

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