Harpoon® Granular Aquatic Herbicide is a chelated copper granule designed to sink down and control copper-sensitive aquatic plants. This product is for nuisance weeds such as water hyacinth while supporting treatment programs where water use cannot be restricted.

Harpoon® Granular is labeled for slow-moving or quiescent bodies of water, including golf course, ornamental, fish and fire ponds, fresh water lakes, fish hatcheries, and potable water reservoirs. It may be applied evenly over target vegetation using a spreader, blower, hand scoop, or other equipment suited to the treatment area.

The granular formulation is especially useful for bottom-growing copper-sensitive species. Supported targets include Hydrilla, Egeria (Brazilian elodea), naiads, elodea, coontail, water lettuce, water hyacinth, giant salvinia, common salvinia, Myriophyllum spp., and members of the Potamogetonaceae family.

• Granular chelated copper aquatic herbicide
• Sinks down to reach bottom-growing copper-sensitive plants
• No listed water-use restrictions for irrigation, animal consumption, swimming, or fishing after treatment
• Ideal for sites such as golf courses where treated water use cannot be restricted
• Available in liquid and granular formulations

Important: Product availability varies by state. Before purchasing, please verify that the product you wish to order is registered for use in your state by checking the “Registered States”. Some states have additional restrictions or prohibitions on certain aquatic herbicides and algaecides. It is a violation of federal law to use any pesticide in a manner inconsistent with its labeling. Customers are responsible for ensuring compliance with all applicable federal, state, and local regulations.