Maple Trees
Q.

Purple Leaf Maple

Anonymous added on March 10, 2011 | Answered

There are patches of grey/white on the bark of my Norwegian maple (Crimson King). Is it likely to be a fungal infection or mildew? It will not wash off easily but can be scraped off with nail.

A.
A.Answers to this queston: Add Answer
Nikki
Certified GKH Gardening Expert
Answered on March 11, 2011

It sounds like the plant just has a lichen. It is not harmful to the plant. Here is more information:
https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm

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