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RECORD NUMBER: 519 OF 1150

OLS Field Name OLS Field Data
Main Title Metabolism of Alachlor and Propachlor in Suspensions of Pretreated Soils and in Samples from Ground Water Aquifers.
Author Novick, N. J. ; Mukherjee, R. ; Alexander, M. ;
CORP Author Cornell Univ., Ithaca, NY. Lab. of Soil Microbiology.;Environmental Research Lab., Gulf Breeze, FL.
Year Published 1986
Report Number EPA-R-809735; EPA/600/J-86/245;
Stock Number PB87-170379
Additional Subjects Acetanilides ; Soil microbiology ; Ground water ; Herbicides ; Metabolism ; Leaching ; Aquifers ; Ecology ; Reprints ; Alachlor ; Acetanilide/N-(methoxymethyl)-dichloro-diethyl ; Propachlor ; Isopropylacetanilide/N-dichloro
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NTIS  PB87-170379 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 7p
Abstract
Suspensions of soils treated in the field with alachlor (2-chloro-2',6'diethyl-N-(methoxymethyl)acetanilide) and propachlor (2-chlor-N-isopropylacetanilide) were tested for their ability to metabolize these herbicides. Less than 8% of (14)C ring-labeled alachlor was mineralized in 30 days at concentrations of 10 and 0.073 micrograms/ml. The soil suspensions mineralized 16-61% and 0.6-63% of ring-labeled propachlor in 30 days at a concentration of 0.025 and 10 micrograms/mL of suspension, respectively. Although soils converted alachlor to organic products, microorganisms able to mineralize the pesticide could not be isolated. Samples from ground water aquifers mineralized less than 1% of the herbicides at the lower concentrations, but four organic products were formed from alachlor. A mixture of two bacteria mineralized 57.6% of ring-labeled propachlor in 52.5 h. A product of the microbial metabolism of propachlor was identified as N-isopropylaniline. These findings suggest that mineralization is a major means for the destruction of propachlor but not for alachlor in soil. (Copyright (c) 1986 American Chemical Society.)