fungus around the trunk at base of red oaks #675271 - Ask Extension


fungus around the trunk at base of red oaks #675271

Asked August 10, 2020, 7:12 PM EDT

I have found this pure white growth only at the base of two red oak trees (out of many) on my property. It appears to be a fungus growing only and entirely around the base of the tree, and a bit on the ground surrounding the tree. Is this a harmful fungus for the tree? What is it, and should I attempt to kill it?

Washtenaw County Michigan

Expert Response

Hi There,

Can you tell me if the substance is soft or crusty?  Can you rise it away with the hose and a soft brush?  Be careful not to damage the tree bark.  If it can be rinsed off, clean off the trees and let them dry out for a few days to see if it comes back.  Have you seen any mushrooms growing around or near the tree last fall or early this spring?  Is your tree otherwise healthy?  Are there any dead limbs or is it loosing leaves?
Pam Voss Replied August 10, 2020, 11:01 PM EDT

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