Applied Biochemists Weedtrine® D Aquatic HerbicideWeedtrine D Aquatic Herbicide controls submersed, floating and emergent weeds including duckweed. Ideal for a broad range of weeds commonly found in ponds. Quickly dilutes in water Easy spray application Non volatile herbicide A surfactant is necessary when using this product with any weed on or above the water surface Available in 1 gallon (4 units in a case) and 5 gallon containers Active ingredient: diquat dibromide US EPA Registration No. 8959 9