15+ Maple Tree Diseases Brown Spots On Leaves. This fungal disease gets its name from the fact that the dark brown spots resemble tar. Often, the problem is a lack of nitrogen or iron.
The good news is that while this disease causes blotchy brown spots to pop up.
As the spots grow and merge, they. Read on to learn what this disease is and how to protect your maple trees against it. A fungal infection is underway! Leaf scorch is identified by browning or greying of leaf margins and/or yellowing or darkening of the anything that affects the plant's ability to take up water, including insect and disease problems, can if your japanese maple has leaf scorch, but the tree is still alive, there's most likely nothing to be too.