white oak question

Asked March 19, 2019, 7:58 PM EDT

there is something on our old, large, white oak tree (pictures attached) Can you tell us what it is and if we should do something about it?
Thank you

Livingston County Michigan forestry trees and shrubs

1 Response

Hello,
Thank you for contacting Ask an Expert!
The fungus growing on the oak branches is nothing to worry about. I'm guessing the branches on which the fungus is growing are dead? The fungus will not affect/infect the live portions of the tree, so there's nothing to worry about there. You can certainly have the dead branches trimmed off for safety. Or, choose not to if there is no danger to anything if the branch drops. If you choose to have the branches trimmed off, please do so prior to April 15th or after July 15th to avoid infecting the tree with oak wilt spores, which are most easily spread (by a beetle) during that time period. If you must trim during that time period, just be sure to paint the wounds immediately after cutting.
If you have any further questions please feel free to contact me by replying to this thread or using the information below.
Thank you!
Julie