Hello! Ivy is creeping under the old fence amongst small rocks (hard to pull out the vines) between my neighbour's property and mine and I fear that, if it gets a better hold in the fence, it will pull it down. I keep cutting it back but it is relentless. I cannot access its source which is in my neighbour's yard (to the south of mine), between one of his bushes and the fence. My neighbour told me that if I need to prune his trees (for my view), to do so as long I can reach them from my yard. I know that neither of us want to bear the cost of replacing the fence and that my neighbour isn't interested in maintaining his unruly yard. I understand that I can crush the leaves while they remain on the stalk to assist its demise. But what can I use to kill it, from my side? Any assistance would be hugely appreciated.