Quite agree about the roundup applicator - too clumsy to be practical. I agree that bindweed is a blasted nuisance, but I keep the whole thing in proportion because in my last garden I had Japanese Knotweed and Horsetail. These were much worse pests because nothing seemed to kill them. I used to cut the knotweed a couple of inches from the ground and pour in full-strength Roundup, with limited success. Nothing worked on the Horsetail. Digging it up was a waste of time. Both were endemic in the surrounding gardens and countryside. In my present garden, I have bindweed and I imported ground elder with a plant I bought, which is frustrating, but it is a doddle compared with the two pests I've mentioned.