Voluntary Purchasing Group 33700 Hi-Yield Killzalll Aquatic Herbicide, 32-Ounce Non-selective Kills Aquatic Annual And Perennial Grasses, Broadleaf Weeds And Woody Brush Species Contains 53.8-percent Glyphosate One Quart Covers Up To One Acre For use in aquatic and other non-crop sites Non-selective Kills aquatic annual and perennial grasses, broadleaf weeds and woody brush species Contains 53.8-Percent glyphosate One-Quart covers up to one acre For use in aquatic and other non-crop sites