Household vinegar usually contains about 5% acetic acid, but this wasn’t strong enough to control weeds, says Jerry Ivany, lead author of the study. The challenge for researchers was to determine the ...
Here's the kicker, though — cooking vinegar won't cut it. You need herbicidal vinegar with an acetic acid concentration of 20% or more. Think of dish soap as your covert ops agent — a surfactant that ...