Efficacy of Herbicide Active Ingredients Against Aquatic Weeds

Hydrilla in a lake

Weed control is often a critical component of aquatic vegetation management in Florida waters. While physical, mechanical, and biological controls are utilized where they are feasible, herbicides are the primary tool used to control many troublesome species. This document answers some common questions and provides efficacy information for all herbicide active ingredients labeled for aquatic use in Florida. Written by S. F. Enloe, M. D. Netherland, W. Haller, and K. Langeland, and published by the UF/IFAS Agronomy Department, revised February 2018.

Constructing Weighted Trailing Hoses for Submersed Aquatic Herbicide Applications (SSAGR352/AG360)

Bottom acre-foot treatment with weighted trailing hoses.Why treat the upper half of the water column when the weeds are only present in the lower half? This 4-page fact sheet describes the benefits of using the “bottom acre-foot method” of applying herbicides with weighted trailing hoses and details the construction of the weighted trailing hose system used by the University of Florida Center for Aquatic and Invasive Plants.
Written by William T. Haller, Lyn A. Gettys, and Margaret S. Glenn, and published by the UF Department of Agronomy, August 2011.

SSAGR44/AG262 Efficacy of Herbicide Active Ingredients Against Aquatic Weeds

SS-AGR-44, a 3-page fact sheet by K. Langeland, M. Netherland, and W. Haller, provides a quick reference table describing the effectiveness of herbicide active ingredients for controlling common aquatic weeds, with guidance for their legal use. Published by the UF Department of Agronomy, June 2009.