Full TGIF Record # 82704
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1081/PFC-120014871
    Last checked: 10/09/2015
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Publication Type:
i
Report
Author(s):Kim, Jung-Ho; Feagley, Sam E.
Author Affiliation:Kim: Department of Environmental Science, Kyungsan University, Kyungsan, South Korea; and Feagley: Soil and Crop Science Department, Texas A & M University, College Station, TX
Title:Leaching of trifuralin, metolachlor, and metribuzin in a clay loam soil of Louisiana
Source:Journal of Environmental Science and Health: Part B: Pesticides, Food Contaminants, and Agricultural Wastes. Vol. B37, No. 5, September 2002, p. 393-403.
# of Pages:11
Publishing Information:New York: Marcel Dekker
Keywords:TIC Keywords: Trifluralin; Metolachlor; Metribuzin; Half-life; Wells; Well water; Leaching; Adsorption; Groundwater; USEPA; Federal legislation; Potable water; Clay soils; Herbicide persistence
Abstract/Contents:"Trifluralin[2,6-dinitro-N,N-dipropyl-4-(trifluormethyl)be< >nzenamine], metolachlor[2-chloro-N-(2-ethyl-6-methylphenyl)-N- (2-methoxy-1-methylethyl) acetamide], and metribuzin[4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1, 2,4-triazin-5(4H)one] were applied in field plots located on a Commerce clay loam soil near Baton Rouge, Louisiana at the rate of 1683 g/ha, 2759 g/ha and 609 g/ha, respectively. The half-lives of trifluralin, metolachlor, and metribuzin in the top 0-15 cm soil depth were found to be 54.7 days, 35.8 days and 29.8 days, respectively. The proportion of trifluralin, metolachlor, and metribuzin in the top 0-15 cm soil depth was 94.7%, 86.6%, and 75.4%, respectively of that found in the top 0-60 cm soil depth 30 days after application. Trifluralin concentrations were within a range of 0.026 ng/mL to 0.058 ng/mL in 1 m deep well water, and between 0.007 ng/mL and 0.039 ng/mL in 2 m deep well water over a 62 day period after application. Metolachlor concentrations in the 1 m and 2 m wells ranged from 3.62 ng/mL to 82.32 ng/mL and 8.44 ng/mL to 15.53 ng/mL, respectively. Whereas metribuzin concentrations in the 1 m and 2 m wells ranged from 0.70 ng/mL to 27.75 ng/mL and 1.71 ng/mL to 3.83 ng/mL, respectively. Accordingly, trifluralin was found to be strongly adsorbed on the soil and showed negligible leaching. Although metolachlor and metribuzin were also both readily adsorbed on the soil, their leaching potential was high. As a result, in the clay loam soil studied, metribuzin concentration in groundwater with shallow acquifers is likely to exceed the 10 mg/L US Environmental Protection Agency (EPA) advisory level for drinking water early in the application season, whereas trifluralin and metolachlor concentrations are expected to remain substantially lower than their respective 2 ng/mL and 175 ng/mL EPA advisory levels."
Language:English
References:21
Note:Figures
Graphs
Geographic Terms:Baton Rouge, LA
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kim, J.-H., and S. E. Feagley. 2002. Leaching of trifuralin, metolachlor, and metribuzin in a clay loam soil of Louisiana. J. Environ. Sci. Health. B37(5):p. 393-403.
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http://www.tandfonline.com/doi/pdf/10.1081/PFC-120014871
    Last checked: 10/09/2015
    Requires: PDF Reader
    Access conditions: Item is within a limted-access website
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