Horticultural Vinegar – 20% Horticultural Vinegar22Vinegar as an Herbicide22 Information Page The word vinegar comes from 27vinegre27, coined from two Latin words vinum meaning wine and acer meaning sour. There are a number of historical references about the use of vinegar as a preservative, condiment, beauty aid, cleaning agent and medicine. Environmental fate of acetic acid: Acetic acid readily degrades in water and has little potential for bioaccumulation. In an experiment conducted at the Swedish Agricultural University it was found that a solution of 24 % vinegar to a peat soil decreased the pH of the soil from 7.3 to 5.6. However, after 48 hours, the pH values of the soil returned to 7.0-7.5. Spot spraying at the base of corn rows in the field indicated that corn plants were not affected by vinegar, and 90-100 percent. control of weeds was obtained. Potential applications for using vinegar for controlling weed: Environmentally safe herbicide for spot treatment on organic farms Control of unwanted vegetation along roadsides and range lands Control of weeds by homeowners around yards, brick walls mid patios Weed control in cracks in pavement WARNING: Note that vinegar with acetic acid concentrations greater Horticultural Vinegar than 5% may be hazardous and should be handled with appropriate precautions. For vinegar safety information see Vinegar Material Safety Data Sheet The U.S. Agriculture Department scientists say they27ve proven that vinegar can be an effective alternative to conventional herbicides for organic farmers and gardeners. Older plants require higher concentrations. Best applied at early growth stages.