Harris Weed Killer RTU Liquid 1 qtHarris 20% Vinegar Weed Killer is a horticultural vinegar, used for organic production. It is a quick acting, non selective contact herbicide containing an organic acid for which the residues degrade promptly in the soil. Foliar contact results in rapid desiccation and control of annual weeds and grasses and top growth reduction of herbaceous perennial weeds and grasses. Helps non selectively control broadleaf weeds and weed grasses Adjustable trigger