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Title: Triclopyr (Garlon 3A) dissipation in Lake Seminole, Georgia
Authors: University of Florida. Center for Aquatic Plants.
Aquatic Plant Control Research Program (U.S.)
Green, W. Reed.
Westerdahl, Howard E.
Joyce, Joseph C.
Haller, William T.
Keywords: Aquatic herbicide
Herbicide dissipation
Environmental fate
Garlon 3A
Aquatic plants
Aquatic weeds
Lake Seminole
Issue Date: Mar-1989
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Miscellaneous Paper
Abstract: A liquid formulation of triclopyr (Garlon 3A) was applied under Experimental Use Permit at proposed maximum rates to areas of Lake Seminole, GA, in order to examine herbicide dissipation and environmental fate. Residue persistence varied between the two treated plots. Triclopyr residues persisted in water above detectable levels through posttreatment day 3 in one plot and through posttreatment day 21 in the other. The residue half-life for the two plots was 0.5 and 3.4 days, respectively. Triclopyr (≤0.3 mg/kg) was found in the sediment only on treatment day and posttreatment day 1. Triclopyr residues in plant tissue (>1.0 mg/kg) existed through posttreatment day 8. Triclopyr residues were not detected in fish but were detected in caged crayfish through posttreatment day 21. Indigenous clam tissue contained triclopyr residues only through posttreatment day 1. Based on the results of this study, applications of the Garlon 3A formulation of triclopyr for submersed aquatic plant control should not produce adverse effects on the environment. However, further evaluation of the accumulation and effects of triclopyr on clams and crayfish should be considered before establishing tolerance limits.
Appears in Collections:Miscellaneous Paper

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