...dandelions.
The topic of handy-dandy weedkiller applicators seems to come up at least as often as dandelions do. I just ran across another nifty herbicide applicator for people who'd rather not spray: The Dandy-Lion Killer. It's a spray tank and wetter/roller applicator on wheels. Two versions - a 3-foot wide one to push, and a larger one (4 foot or 6 foot) to tow behind your lawn tractor. No spray drift.
Company's catalog is here: