Just noticed this problem a couple of days ago. We had a water feature installed last September and this 6-7ft J.Maple was planted at that time. It's been doing great but now I'm finding what you see in the pictures. We have had a lot of rain this spring and so far this summer. I've checked for bugs and such but cannot find any. Does anyone have any idea what the problem could be and a possible solution? I'm old and new to all this green thumb stuff but I'm trying to learn. Thanks for any help.