I guess I better clarify what I meant!
Yes - salting a huge area would not be good. But what I am talking about is
a very judicial salting exactly on the cut/open roots. Just enough to take the life out of the roots and dry them up. The idea is that the roots take up the salt or whatever is used and it stays pretty isolated to the roots...not the whole ground!
I like Janet's idea of
specifically targeting the big vines. If I have an area like that I'll do what she said - c
ut the vine then put a judicious amount of poison - either salt or white vinegar or the like - right onto the cut and let it dry up before removing it from a tree or ground.
While that's in process of drying out, I'll
dig out the plants that have greenary w/roots and dispose of them.