Maple Trees Getting Spots on Leaves

Asked June 12, 2017, 4:22 PM EDT

My 2 Maple trees are getting spots on the leaves and eventually the leaves fall off a couple of branches now have no leaves, please see attached photographs and please advise, many thanks!

Hennepin County Minnesota

2 Responses

Hi there--
It looks like you've got either anthracnose or tar spot but I can't be sure from your photos. Here is the U of M's guide regarding "spots or blotches on leaves":

I'm leaning more toward anthracnose.

The response for both is generally the same, thankfully.
Best practice is to clean up leaves that fall--now and in the autumn. Both are passed via decaying leaves from the year before.

If a tree is completely defoliated several years in a row, you can consider a fungicide but if this is the first year, I'd try getting rid of as many fallen leaves as possible and see what happens next year.


Many thanks for your help!