46+ Maple Tree Diseases Brown Spots On Leaves. Bacterial leaf spot diseases often start as small dark brown to black spots with a halo of yellow tissue. Leaves may fall prematurely and the disease can spread to branches.
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The good news in all of this is that the disease, even though aesthetically. The most obvious signs are purplish brown spots that form along the leaf veins. Below you will find a closer look at the problem, including.
Most leaf spot diseases affect only a small percentage of the tree's overall leaf area wet conditions promote disease, so water trees at the base and be careful not to splash water on leaves.
The good news is that while this disease causes blotchy brown spots to pop up. The disease may go unnoticed until a large number of leaves are severely infected and begin to fall from the tree. However, efforts to maintain tree health and vigor can help to prolong. Won't kill your maple tree, but keep those spots away with a black fruiting pods may appear on these leaves, which then cause leaf fall.