Flumigard SC is an Alligare aquatic herbicide containing 42 percent flumioxazin (4 lb per gallon), EPA Reg. No. 81927-78. It is a fast-acting contact herbicide for control of submersed and floating aquatic weeds including hydrilla, Eurasian watermilfoil, duckweed, and pondweed, and it delivers rapid knockdown of filamentous algae in copper-sensitive locations. Labeled for lakes, ponds, reservoirs, canals, and drainage ditches by surface or subsurface application.