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Instantaneous Degradation of Parathion in Anaerobic Soils
Author(s) -
Wahid P. A.,
Ramakrishna C.,
Sethunathan N.
Publication year - 1980
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1980.00472425000900010027x
Subject(s) - parathion , soil water , chemistry , environmental chemistry , degradation (telecommunications) , oryza sativa , pesticide , parathion methyl , agronomy , environmental science , soil science , biology , biochemistry , telecommunications , computer science , gene
In flooded rice ( Oryza sativa L.) culture, the pesticides are applied to rice fields after several days of submergence when the soil is already in a reduced state. Parathion ( O,O ‐diethyl O,p ‐nitrophenyl phosphorothioate) was, therefore, equilibrated with soils previously reduced by flooding with water and then analyzed by isotope technique or by gas‐liquid chromatography. Instantaneous surface‐catalyzed degradation of parathion occurred when the insecticide was shaken for as little as 5 sec with soils prereduced by flooding. Aminoparathion was the major product of this reaction. The interaction of parathion with prereduced soil appeared to be mediated by soil enzymes and/or other heat‐labile substances produced by soil anaerobiosis.