Watermeal in Farm Ponds
Extension Agent - Livestock
Issue/Alert Affecting Crop: What can you do to treat watermeal in a pond? The pond in question does not have livestock using it as a water source.
Watermeal in Farm Pond Photo Credits: Jed Dillard
What Does the Specialist Say About This: Watermeal is difficult to control. The only thing close is fluridone-containing compounds These aquatic herbicides work if there is no water exchange in the pond, but only limited control can be expected and they are expensive. Nutrient reduction, if feasible, may lessen the problem over time. On the bright side, there is a new herbicide, Clipper (active ingredient is flumyoxazin), that should be registered by November 2010. It is reported to be effective, and it worked outstandingly in one trial I conducted. The price of this new aquatic herbicide has not been set. Kenneth A. Langeland, Ph.D. Professor-Aquatic and Invasive Plant, UF Department of Agronomy