Black spots on leaves - Ask Extension
My maple tree leaves have black spots over them and it’s losing leave like crazy.
( submitting this question a second time as I miss typed my ema...
Knowledgebase
Black spots on leaves #833460
Asked June 02, 2023, 8:49 PM EDT
My maple tree leaves have black spots over them and it’s losing leave like crazy.
( submitting this question a second time as I miss typed my email address)
Macomb County Michigan
Expert Response
Good Morning,
This is likely anthracnose or leaf blister on the maple leaves.
Like anthracnose, maple leaf blister is unlikely to threaten a healthy tree, and cultural practices described for anthracnose can reduce spread of the fungus and the risk of serious damage to the tree. Anthracnose and leaf blister can occur on a tree at the same time. The only way to be certain if a tree has one or the other or both is to send samples to a diagnostic laboratory, such as Michigan State University’s Plant & Pest Diagnostic lab, and have it confirmed.
https://www.canr.msu.edu/news/maple_leaf_blister_and_anthracnose_two_foliar_diseases_that_can_appear_on_s
I hope this helps. Thanks for using our service.
This is likely anthracnose or leaf blister on the maple leaves.
Like anthracnose, maple leaf blister is unlikely to threaten a healthy tree, and cultural practices described for anthracnose can reduce spread of the fungus and the risk of serious damage to the tree. Anthracnose and leaf blister can occur on a tree at the same time. The only way to be certain if a tree has one or the other or both is to send samples to a diagnostic laboratory, such as Michigan State University’s Plant & Pest Diagnostic lab, and have it confirmed.
https://www.canr.msu.edu/news/maple_leaf_blister_and_anthracnose_two_foliar_diseases_that_can_appear_on_s
I hope this helps. Thanks for using our service.
