Journal of Aquatic Plant Management
The Aquatic Plant Management Society
APMS Home Page Volume 41 Table of Contents

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Volume

41, 2003

Issue

1

Page

25

   

Title

Efficacy and Residue Comparisons between Two Slow-release Formulations of Fluridone

 

 

Author(s)

Tyler J. Koschnick, W.T. Haller, V.V. Vandiver, and U. Santra

 

 

Keywords

 

 

Abstract

Residue profiles and efficacy of Avast and Sonar, two slow release pellet formulations of fluridone {1-methyl-3-phenyl-5-[3-(trifluoromethyl)phenly]-4(1H)-pyridinone}, were compared in outdoor tanks. Hydrilla (Hydrilla verticillata (L.f.) Royle) and southern naiad (Najas guadalupensis (Sprengel) Magnus) were treated with a split application of 6, 12, 18 and 24 ?g/l a.i. fluridone and the concentrations of both formulations compared over a 134-day period. Both pellet formulations exhibited very similar residues over time for each respective treatment, resulted in peak concentrations of fluridone 40 to 50 days after application, and effectively and similarly controlled southern naiad and hydrilla at all rates tested by 92 days after initial application.