Maple tree leaves with black spots - Ask Extension
We have 2 (silver I think) maple trees (10-12" diameter) in our yard that have developed black spots on the leaves throughout the tree. The spots are...
Knowledgebase
Maple tree leaves with black spots #407382
Asked June 15, 2017, 3:02 PM EDT
We have 2 (silver I think) maple trees (10-12" diameter) in our yard that have developed black spots on the leaves throughout the tree. The spots are dead sections of the leaf. Can you give me an idea what it might be and how to remedy this and protect our trees? Thanks!
Olmsted County Minnesota
Expert Response
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Anthracnose Discula campestris, D. umbrinella,
Aureobasidium
apocryptum, Colletotrichum gloeosporioides
The tree was infected with anthracnose in our early cool,wet spring just as the leaves are expanding. Fortunately, this leaf spotting and leaf distortion will have very little affect on the health of the tree.
http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/anthracnose/
