Record Display for the EPA National Library Catalog

RECORD NUMBER: 7 OF 11

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.)