Monsanto Ranger Pro Herbicide 2.5 Gallon Jug

Ranger Pro works. I have one really strong weed to kill. I mixed 16oz to 2gal water. 5 days later they are starting to shrivel up and die. I mixed 8oz to 2gal water and starting to see them turning yellow 5day later. I have another area I will try 6oz to 2gal water to see if that still kills this tall stem looking weed that popped up every wear that has never grown their before. I hope this helps.