I have a couple of properties w/ Black Walnut tree's. For about the last 3 weeks they have been dropping leaves like mad. They are almost completely defoliated now. I had one customer ask me why they are dropping so early and she thinks the tree is dying. She thinks the tree is getting drowned and it is causing the tree to die. We have had a ton of rain this summer and maybe she's right??? I don't know but I told her I think it's a disease problem brought on by the damp weather. I promised I would get her an answer ASAP. Anybody have any idea what I am looking at here???