FlumiGard™ herbicide, the new standard in aquatic and terrestrial plant control. FlumiGard™ herbicide provides fast and long term selective control of some of the toughest and most problematic species in aquatic and terrestrial vegetation management. FlumiGard™ herbicide is powered by the active ingredient flumioxazin, an N-phenylphthalimide herbicide. The mode of action in this chemistry family is inhibition of protoporphyrinogen oxidase (Protox), an enzyme important in the synthesis of chlorophyll. Formulated as a water dispersible granule, it contains 51% active ingredient of flumioxazin.