Japanese Maples: How can this happen ?, 2 by digger9083

digger9083 wrote:
I sat back , regrouped , decided I could work it out and after many false starts , the test forum , and my McDonald hard head , GOT IT!
First pic is the slight swelling ,tree still alive
Second , ignore, mistake .I didn't scroll down far enough
Third , Outer bark , off and peeling ,dead
Fourth , My beautiful blood red JP, dug and potted to hopefully save ,dead .
I hope you can id what's happening . I have several grafted trees that I have a lot of money in . None of those have been affected