Maple Tree Leaf Disease? - Ask Extension
Maple Tree leaves have brown spots. Please advise.
Knowledgebase
Maple Tree Leaf Disease? #833444
Asked June 02, 2023, 6:51 PM EDT
Maple Tree leaves have brown spots. Please advise.
Berrien County Michigan
Expert Response
Hello,
This appears to be maple leaf blister, which is a common fungal disease that affects many maple trees in the spring. The good news is that it rarely affects the health of the tree, and no treatment is necessary. Read more about this disease here: https://hortnews.extension.iastate.edu/2009/6-3/leafblister.html
The best thing to do for this is to rake and bag leaves that fall and discard them so that they are not providing innoculant for future infections.
Thank you for contacting Ask Extension.
Ruth
This appears to be maple leaf blister, which is a common fungal disease that affects many maple trees in the spring. The good news is that it rarely affects the health of the tree, and no treatment is necessary. Read more about this disease here: https://hortnews.extension.iastate.edu/2009/6-3/leafblister.html
The best thing to do for this is to rake and bag leaves that fall and discard them so that they are not providing innoculant for future infections.
Thank you for contacting Ask Extension.
Ruth
