Hi-Yield Killzall 32 Oz. Concentrate Weed & Grass Killer Aquatic HerbicideNon selective weed and grass killer labeled for use in aquatic and other non crop sites. Controls annual and perennial grasses, broadleaf weeds, plus woody brush species listed on the label. Also provides excellent control of Canadian thistle, chickweed, dock, foxtail, pigweed, ragweed, and many other plants listed on the label. Non toxic to dogs and other domestic animals, but ingestion of this large amounts of this product may cause vomiting or