| The acetochlor registration partnership: prospective ground water monitoring program. | |
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MedLine Citation:
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PMID: 15888886 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The Acetochlor Registration Partnership conducted a prospective ground water (PGW) monitoring program to investigate acetochlor [2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)-acetamide] transport to ground water at eight sites. The distribution of soil textures among these sites was weighted toward coarser soil types, while also including finer-textured soils that dominate most corn (Zea mays L.)-growing areas of the United States. Each site consisted of a 1.2-ha test plot adjacent to a 0.2-ha control plot. Suction lysimeters and monitoring wells were installed at multiple depths within each test and control plot to sample soil-pore water and near-surface ground water. Irrigation was applied to each site during the growing season to ensure water input of 110 to 200% of average historical rainfall. Acetochlor dissipated rapidly from surface soils at all sites with a DT(50) (time for 50% of the initial residues to dissipate) of only 3 to 9 d, but leaching was not an important loss mechanism, with only 0.25% of the 15,312 soil-pore water and ground water samples analyzed containing parent acetochlor at or above 0.05 microg L(-1). However, quantifiable residues of a soil degradation product, acetochlor ethanesulfonic acid, were more common, with approximately 16% of water samples containing concentrations at or above 1.0 microg L(-1). A second soil degradation product, acetochlor oxanilic acid, was present at concentrations at or above 1.0 microg L(-1) in only 0.15% of water samples analyzed. The acetochlor PGW program demonstrated that acetochlor lacks the potential to leach to ground water at detectable concentrations, and when applied in accordance with label restrictions, is unlikely to move to ground water at concentrations hazardous to human health. |
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Authors:
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Andrew C Newcombe; David I Gustafson; John D Fuhrman; Ian J van Wesenbeeck; Nick D Simmons; Andrew J Klein; Kim Z Travis; Kevin J Harradine |
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Publication Detail:
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Type: Journal Article Date: 2005-05-11 |
Journal Detail:
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Title: Journal of environmental quality Volume: 34 ISSN: 0047-2425 ISO Abbreviation: J. Environ. Qual. Publication Date: 2005 May-Jun |
Date Detail:
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Created Date: 2005-05-12 Completed Date: 2005-09-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0330666 Medline TA: J Environ Qual Country: United States |
Other Details:
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Languages: eng Pagination: 1004-15 Citation Subset: IM |
Affiliation:
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LFR Levine Fricke, 1413 Woodlawn Avenue, Wilmington, DE 19806, USA. andy.newcombe@lfr.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Environmental Monitoring* Herbicides / analysis* Humans Porosity Public Health Risk Assessment Soil Pollutants / analysis* Solubility Toluidines / analysis* United States Water Movements Water Pollutants / analysis* |
| Chemical | |
Reg. No./Substance:
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0/Herbicides; 0/Soil Pollutants; 0/Toluidines; 0/Water Pollutants; 34256-82-1/acetochlor |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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