i had an oak come down in a storm a few days ago, and the poison oak vines are so large that they have limbs extending up to 10 feet off the tree. the surface of the tree is probably 2/3 covered in the vines that are up to 3 and 4 inches in diameter. there's no way i can cut the tree up without getting the poison oak all over me. getting close to it is like walking into a gauntlet. i didn't realize the limbs were from the poison at first, because they look just like small tree branches with the leaves just starting to develop. my question is, how long with it take to die? thanks.