I do not like Greenbrier here in my Georgia Gardens. And it is most difficult to eradicate. Just look at the nasty roots of this vine! This is the root to one vine that keeps going and going and going. Compare the size to the standard clay brick!
Greenbrier (Smilax bona-nox), AKA: Catbrier, Sawbrier (Click HERE for more) is a pretty vine but most pesky here in my gardens. The only way to rid yourself of this pain is to Pull/Dig the Tubers from the ground. Then if you leave one little sprig, you will soon have another vine!