Shaved oak tree trunks

Asked January 8, 2019, 6:48 AM EST

I notice in Newell Park in St. Paul almost every tree-- oaks and ashes, mainly -- have parts of their trunks "shaved." I worry that every tree is going to die. Is this shaved characteristic a sign of disease or of treatment?

Ramsey County Minnesota tree health smooth patch

3 Responses

Thank you for the question. I haven't seen this so I don't know to what you are referring. Is it possible to get some photos of what you describe?

Sure, I just fell on the ground taking these pictures. I'm OK. here they are, shaved trees -- disease or treatment?

Thank you for the photos. Another Expert suggests this might be a fungal condition called smooth patch. It does not affect the tree's health. Read more about it here:
https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/oak/branchescolor.html

Thank you for contacting Extension.