RE: how much round up
The amount of concentrate you mix DOES matter! There is a huge % solution difference in 20 oz. glyphosateper 20, 30, or 40 gallons. Do the math! 20 oz divided by 20 gallons(2560 oz.)= .78% solution, 20 oz. divided by 30 gallons(3840 oz.)= .52 % solution and so on. The more water you use the less % of glyphosate you will have. According to the instructions most plants require a 1.5 % solution to effectively kill them.Or, about 60 oz. per 30 gallons= 1.56% solution. Do you guys get good kills using .78% solution 20 oz. per 20 gallons??? If so I need to cut way back!