We moved from IL to TX last summer & was thrilled when we found a house that backed up to a wooded area & a creek. The wooded area, unfortunately, is overgrown with weeds & thorny vines. We've been working on killing everything, but just can't seem to get rid of these pesky thorny vines that climb from the ground and attach themselves to tree branches. Can anyone help with suggestions on how to permanently kill these stinkers?!!