Flumioxazin is marketed under the name Clipper. It is

• A. A slow-release fertilizer
• B. A soluble granular broad-spectrum contact herbicide that controls submerged, emergent, floating macrophytes and certain filamentous algae
• C. A systemic liquid herbicide for all aquatic plants
• D. A hormonal growth regulator for aquatic plants

Answer: (B)

Flumioxazin (Clipper) is described by its action and formulation. It is a soluble granular product that disperses in water to contact plant tissues. Its effectiveness comes from acting as a contact herbicide, meaning it must touch the plant to kill it rather than moving systemically through the plant to treated tissues. This gives it broad-spectrum activity against many aquatic weeds, including submerged, emergent, and floating macrophytes, and it also affects some filamentous algae. It is not a slow-release fertilizer, nor a systemic herbicide that moves throughout all plant tissues, nor a hormonal growth regulator. The description reflects how Flumioxazin works and how it is formulated, which is why it is the best match.