|5 Yr old red oak from nursery, 8|
|It doesn't sound good for your oak tree! What you describe sounds like oak wilt but of course I can't diagnose it positively without seeing the tree. However, I found a publication with photos that will enable you to compare the leaves of your tree to the leaves of a diseased oak. This way you can confirm or rule out the posibilty of wilt. Here's the web address of the publication: http://www.extension.iastate.e...
I hope it is helpful.