Full TGIF Record # 135594
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DOI:10.1080/03601230701771107
Web URL(s):http://www.tandfonline.com/doi/full/10.1080/03601230701771107
    Last checked: 09/05/2014
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Publication Type:
i
Report
Author(s):Anhalt, Jennifer C.; Moorman, Thomas B.; Koskinen, William C.
Author Affiliation:Anhalt: Department of Microbiology, Iowa State University, Ames, Iowa; Moorman: United States Department of Agriculture, Agricultural Research Service, National Soil Tilth Laboratory, Ames, Iowa; Koskinen: United States Department of Agriculture, Agricultural Research Service, Soil and Water Management Research Unit, Saint Paul, Minnesota
Title:Degradation and sorption of imidacloprid in dissimilar surface and subsurface soils
Source:Journal of Environmental Science and Health: Part B: Pesticides, Food Contaminants, and Agricultural Wastes. Vol. 43, No. 3, March/April 2008, p. 207-213.
# of Pages:7
Publishing Information:New York: Marcel Dekker
Related Web URL:http://www.tandfonline.com/doi/abs/10.1080/03601230701771107#.VAoHW7S-2f8
    Last checked: 09/05/2014
    Notes: Abstract only
Keywords:TIC Keywords: Degradation; Sorption; Imidacloprid; Soils; Leaching; Pesticides; Subsoil; Microbial activity; Application rates
Abstract/Contents:"Degradation and sorption/desorption are important processes affecting the leaching of pesticides through soil. This research characterized the degradation and sorption of imidacloprid (1-[(6-chloro-3-pyridinyl)-methyl]-N-nitro-2-imidazoli< >dinimine) in Drummer (silty clay loam) and Exeter (sandy loam) surface soils and their corresponding subsurface soils using sequential extraction methods over 400 days. By the end of the incubation, approximately 55% of imidacloprid applied at a rate of 1.0 mg kg-1 degraded in the Exeter sandy loam surface and subsurface soils, compared to 40% of applied imidacloprid within 300 days in Drummer surface and subsurface soils. At the 0.1 mg kg-1 application rate, dissipation was slower for all four soils. Water-extractable imidacloprid in Exeter surface soil decreased from 98% of applied at day 1 to >70% of the imidacloprid remaining after 400 d, as compared to 55% in the Drummer surface soil at day 1 and 12% at day 400. These data suggest that imidacloprid was bioavailable to degrading soil microorganisms and sorption/desorption was not the limiting factor for biodegradation. In subsurface soils >40% of 14C-benzoic acid was mineralized over 21 days, demonstrating an active microbial community. In contrast, cumulative 14CO2 was less than 1.5% of applied 14C-imidacloprid in all soils over 400 d. Qualitative differences in the microbial communities appear to limit the degradation of imidacloprid in the subsurface soils."
Language:English
References:38
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Anhalt, J. C., T. B. Moorman, and W. C. Koskinen. 2008. Degradation and sorption of imidacloprid in dissimilar surface and subsurface soils. J. Environ. Sci. Health. 43(3):p. 207-213.
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DOI: 10.1080/03601230701771107
Web URL(s):
http://www.tandfonline.com/doi/full/10.1080/03601230701771107
    Last checked: 09/05/2014
    Access conditions: Item is within a limited-access website
http://www.tandfonline.com/doi/pdf/10.1080/03601230701771107
    Last checked: 09/05/2014
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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