Microbial degradation of commonly used agrochemicals in tropical rice culture

Sethunathan, N. (1989) Microbial degradation of commonly used agrochemicals in tropical rice culture. Documentation. Central Rice Research Institute, Cuttack, Orissa, India.

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This study used gas-liquid chromatography and radiotracer techniques to assess the degradation processes of some commonly used pesticides in tropical rice culture. Some of the findings include: 1) Carbofuran was more persistent in subsurface soil than in the surface while both isomers of HCH were more persistent in the surface soil: 2) In general the three insecticides (Parathion, methyl parathion and fenitrothion) appeared to be less persistent under flooded condition; 3) Carbofuran and its hydrolysis product, 7-phenol are more mobile in non-puddled plot due to high percolation rate; 4) Repeated applications of carbofuran to a flooded soil held at 35 deg C. led to a distinct enrichment of carbofuran-degrading principle. The enrichment culture developed at 35 deg C and the bacterium (Arthrobacter spp.) isolated from this culture completely mineralized carbofuran to carbon dioxide with in 2 to 5 days: 5) The rate and pathway of methyl parathion degradation was governed by soil type and temperature.

Item Type: Monograph (Documentation)
Uncontrolled Keywords: Oryza sativa; Crop production; Agricultural chemicals; Microbial degradation; Tropics; Pesticides; Arthrobacter
Author Affiliation: Department of Environment, Central Rice Research Institute, Cuttack - India
Subjects: Soil Science and Microbiology
Divisions: General
Depositing User: Mr B Krishnamurthy
Date Deposited: 05 Sep 2014 07:20
Last Modified: 05 Sep 2014 07:20
URI: http://eprints.icrisat.ac.in/id/eprint/13340

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