I am hoping it is not the dreaded vericillium wilt. This is a fairly young tree that has been in the ground for one full year. Caliper is about 1 1/2" and it's 5' tall. I have been out of town for a week and today when I looked at the tree, all of the newly emerging leaves were wilted, all throughout the tree. The trunk is also black, up to the lower limbs, although none of the limbs themselves are black. I do recall noticing the trunk color looking funny before I left town but it's much worse now. I took a sample to my local nursery and the person thinks it's verticillium wilt but isn't sure. What threw him off is that none of the branches are black. The sample I gave him had the wilted leaves, but was completely green when he scratched off the cambium. All I've done so far is to give it a dose of some Super Thrive, this vitamin type booster. I am worried if it is verticillium wilt because I have an Orido nishiki about 20 feet away. It looks OK for now though. Any suggestions would be appreciated.