Posted: 08/07/2013 at 09:03
Yes I know just what you mean. Our neighbour's garden presents a wall of bindweed when I look over the fence. Very tricky. I like your nod to special branch. Nice to think that one of them is reading gardener's world forum.
It's such a shame that your neighbours are not helpful. When I had the same problem 20 years ago, I did just pull up the fronds in my garden, and my neighbours did the spraying, as the bulk of the plant was on their grounds. It meant that they were able to finish off the plant in one shot without affecting bought plants. Might be a thought to contact the council noxious weeds dept just in case they can help.
The idea of the paintbrush is nice, for not getting the stuff on your hands, though perhaps a paintroller would be more the thing. The problem is that the fronds are so whippy, that you really need to grasp them to cost the surface with liquid.
Good luck anyway, Please do let us know how you get on.