Which statement best describes fluridone's use?

• A. Only for still water not for any large scale.
• B. Best used for large-scale or whole lake treatments with low concentrations and long contact.
• C. Effective only with high concentrations for rapid kill.
• D. Only in flowing water spot treatments.

Answer: (B)

Fluridone is a slow-acting, systemic aquatic herbicide best suited for treating large water bodies rather than individual spots. It works by being taken up by the plant and moving through its tissues, disrupting pigments involved in photosynthesis. Because the effect unfolds over weeks to months, you apply it at low concentrations to cover a whole lake or large area and rely on extended exposure to achieve control. This approach minimizes rapid, high-dose effects and reduces non-target impacts, making it ideal for whole-lake or large-scale treatments rather than quick, concentrated kills or targeted spot treatments.