Horticultural 20% Vinegar Biopesticide - for Non-Selective Control of Herbaceous Broadleaf Weeds and Weed Grasses which Surround Food crops, Non-food crops and Non-production Agricultural, Farmstead, Right-of-Way, and Institutional Land Sites. Vinegar Weed Control Herbicide is vinegar at 20% acetic acid, manufactured the same way as food grade vinegar. 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. For control of established perennial weeds, retreatment may be necessary. May be applied up to and including the day of harvest.