Possible verticillium wilt - Ask Extension
I just discovered white spots on the bark of my sugar maple tree. What do you think? Treatment? It is a beautiful tree and I don't want to lose it. ...
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Possible verticillium wilt #268983
Asked August 10, 2015, 10:15 AM EDT
I just discovered white spots on the bark of my sugar maple tree. What do you think? Treatment? It is a beautiful tree and I don't want to lose it. Thanks.
Ramsey County Minnesota
Expert Response
We are thinking they are possibly lichens. Lichens do not harm the tree and will only grow in clean air! Visit this site for more info: http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/lichens-on-trees/