Yes that was plan B, but looks like I will have to take a sample to a nursery. Thank You
Just noticed that underneath the leaves each yellow spot has a "furry" growth. I'm unsure about the Rhytisma theory anymore.
Thank You, I will research how to prevent the spread and/or treat the tree.
Hello, I live in Alberta and my tree (Japanese maple?) has these yellowish 1mm growths on its leaves. These growths started about two months ago...