I have a Pin Oak Tree that seems to be dying from the top down but on only half of the tree, the other half seems to be allright. The leaves that have fallen off are all black at the ends of the leaf stem. Can you tell me what disease this is. I have included links to pictures of this. Thanks for your help. [URL=http://home-and-garden.webshots.com/photo/2521324340103379666McVgBN][IMG]http://thumb6.webshots.net/t/96/96/3/24/34/2521324340103379666McVgBN_th.jpg[/IMG][/URL] [URL=http://home-and-garden.webshots.com/photo/2786229800103379666wDcrPM][IMG]http://thumb6.webshots.net/t/96/96/2/29/80/2786229800103379666wDcrPM_th.jpg[/IMG][/URL] [URL=http://home-and-garden.webshots.com/photo/2312269060103379666UhSuvR][IMG]http://thumb6.webshots.net/t/55/555/2/69/6/2312269060103379666UhSuvR_th.jpg[/IMG][/URL]