Maple Tree - Ask Extension
What's wrong with my maple tree - ?
Knowledgebase
Maple Tree #870202
Asked May 26, 2024, 6:56 PM EDT
What's wrong with my maple tree - ?
Clackamas County Oregon
Expert Response
Thank you for your question, Dan. There are diseases, both bacterial and fungal, that cause this decay to happen. With this little bit of information, I would guess that it is a brown rot, described here: https://pnwhandbooks.org/plantdisease/host-disease/maple-acer-macrophyllum-wood-decay
However, a conclusive diagnosis can be done only by examining the tree and the "ooze". I suggest that you either hire a certified arborist to examine it (https://www.treesaregood.org/findanarborist/findanarborist) or submit plant tissue to the OSU Plant Clinic (https://bpp.oregonstate.edu/how-submit-plant-materials). Good luck!
However, a conclusive diagnosis can be done only by examining the tree and the "ooze". I suggest that you either hire a certified arborist to examine it (https://www.treesaregood.org/findanarborist/findanarborist) or submit plant tissue to the OSU Plant Clinic (https://bpp.oregonstate.edu/how-submit-plant-materials). Good luck!
