Purpose: To test the effectiveness of controlling infestations of Hydrilla verticillata and Myriophyllum spicatum using Harpoon Granular Aquatic Herbicide. Field Efficacy Trials - Harpoon ® Granular Aquatic Herbicide on Lake Guntersville in Alabama Applied Biochemists, A Lonza Business with Aquaservices, Inc. Anabaena Pre-treatment Location: Lake Guntersville, in Alabama Applicator: Aquaservices, Inc. Treatment Date: June 23, 2011 Evaluation

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