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The Use of Controlled-Release Fluridone Fibers for Control of Hydrilla (Hydrilla verticillata)

Published online by Cambridge University Press:  12 June 2017

Thai K. Van
Aquatic Plant Manage. Lab., Agric. Res. Ser., U.S. Dep. Agric., Fort Lauderdale, FL 33314
Kerry K. Steward
Aquatic Plant Manage. Lab., Agric. Res. Ser., U.S. Dep. Agric., Fort Lauderdale, FL 33314


A fiber system for controlled delivery of fluridone {1-methyl-3-phenyl-5-[3-(trifluoromethyl)phenyl]-4(1H)-pyridinone} was evaluated for its potential use in the management of the submersed aquatic weed hydrilla [Hydrilla verticillata (L.f.) Royle # HYLLI] in slow-moving water. The release of fluridone from the fibers was first order and could be extended over several days simply by using fibers of larger diameters. Fibers of 0.8- and 1.2-mm diam released fluridone over a period of 40 and 50 days, respectively. Both effectively controlled hydrilla at a rate of 2.2 kg ai/ha in a 4-month study in replicated pools with water flow adjusted to provide one volume change every 24 h. Under the same conditions, the conventional liquid formulation was ineffective and a pellet formulation provided only marginal control.

Weed Control and Herbicide Technology
Copyright © 1986 by the Weed Science Society of America 

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