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HYDROTHOL 191 Granular with alkylamine endothall is a selective, rapid-acting, contact herbicide and algaecide which controls submersed weeds and algae in lakes, ponds, irrigation canals, and drainage ditches. Works rapidly enough to be effective in both still and slow moving water.

HYDROTHOL 191 Granular may be harmful to fish at recommended application rates. Where fish are present the application of HYDROTHOL 191 Granular at rates over 1.0 ppm should be used only for spot treatments, narrow margins, or where some fish kill is acceptable. Do not treat more than 10% of a lake or pond at one time at application rates above 1.0 ppm (parts per million). When treating lakes or ponds with HYDROTHOL 191 Granular begin at the shoreline and work toward the center. Apply parallel to the shoreline. This will herd fish away from the treated area into deeper untreated portions of the lake or pond.

Water treated with HYDROTHOL 191 Granular should not be used for irrigation or human and animal consumption for 7 to 25 days depending on the application rate.

*ALWAYS read and follow the product LABEL instructions, application rates, and water use restrictions. Please utilize the product information supplied by our web site as a guide and contact us to discuss your management goals and specific product requirements, or you may contact the product manufacturer directly.