Can anyone help me with what is doing this to my tree? It is covered on almost every leaf and they are starting to fall off. What can I do to get rid of this problem it is a large tree 20 years old.
THANK YOU!! I think you are right. I was afraid I was going to have to have someone come out and spray it down. I don't like those chemicals. The Missouri weather is responsible :)
The other possibility (still weather related issue) is Anthracnose. The left leaf looks more like Anthracnose than the right leaf in the photo. Here is a link to more information: http://pnwhandbooks.org/plantdisease/maple-acer-sp-anthracnose I would rake up or remove the fallen leaves from the ground.
