Aspen leaf black spots - Ask Extension
Last week our 3 year old aspen tree's leaves began to turn yellow and began to develop black spots and turn black. See attached photo. We live at 82...
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Aspen leaf black spots #362085
Asked September 12, 2016, 7:04 PM EDT
Last week our 3 year old aspen tree's leaves began to turn yellow and began to develop black spots and turn black. See attached photo. We live at 8200 ft. Other aspens in our area have not yet begun to turn.
Thank you for your assistance!
Michael
Ouray County Colorado
Expert Response
I would guess that the disease you have is marssonina leaf spot. I have attached a link to a CSU Extension Fact Sheet about aspen leaf spot disease. It should tell you all you need to know. Follow the instructions in the Fact Sheet.
http://extension.colostate.edu/docs/pubs/garden/02920.pdf
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http://extension.colostate.edu/docs/pubs/garden/02920.pdf
Thank you for contacting Ask An eXpert.
If you have a follow-up question , feel free to contact me directly at <personal data hidden> or <personal data hidden>
