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This article in JEQ

  1. Vol. 7 No. 3, p. 346-348
     
    Received: July 18, 1977
    Published: July, 1978


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doi:10.2134/jeq1978.00472425000700030010x

Biological Hydrolysis of Parathion in Natural Ecosystems1

  1.  Sudhakar-Barik and
  2. N. Sethunathan2

Abstract

Abstract

Parathion (O, O-diethyl O,p-nitrophenyl phosphorothioate) was applied to flooded soils and to water and sediment river, lake, and pond samples at 15-day intervals. While p-nitrophenol (O, O-dimethyl O,p-nitrophenyl phosphorothioate), the hydrolysis product of parathion, was not detected, even at the end of 12 days after the first addition, it was detected in all samples within 6 hours after two or three additions of the insecticide. Enrichment cultures from the samples of different ecosystems lost their ability to hydrolyze parathion following auto-claving, suggesting microbial participation in parathion hydrolysis.

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