I agree with Larry too! In Australia that is how landcare groups remove mature vines. we call it cut stump. First you make the cut, then you spray poison on the stump. You can cut thru with a chainsaw or scratch the bark to expose the cambium layers with a wire brush . So long as you apply the poison immediatley so the oxygen dose not have a chance to dry the sap flow it will be effective.
Foliar application is rediculous for vines, heat treatment may work.
" It always takes longer to clean up the mess than it did to create it."
The best thing is to know your weeds, how they grow and reproduce so you can be most effective in developing an erradication program.
"It won't happen overnight but it will happen! "
Thank-You for making an effort many would not bother.
We may loose the whole wet tropics rainforests to vines in Oz and the government will not act. Shame on them. Problem is it is everybodys problem.