Gr and weed killer, concentrate. What works for you?

ROUND-UP, which is now available as generic. The Main ingredient is glycophosphate. It works great for me. The greater the concentration, and the higher the temperature, the better. You can use less, and it will still kill, only more slowly. I have even rinsed out the sprayer and refilled with plain water, and it still killed! I keep one sprayer only for Round-up!.