Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/42
Title: A study on the environmental pollution control of some pesticides and insecticides in soil by using bacteriae
Researcher: Mohan Raj, A
Guide(s): Ravichandran, K
Upload Date: 31-May-2010
University: Bharath University
Completed Date: July 2009
Abstract: Pesticides and its derivatives have found their way into every branch of science. They possess a variety of pharmacological, agrochemical and industrial applications. A lot of pesticide derivatives have insecticidal, antiviral, antibacterial, antifungal, antimicrobial, fungicidal and herbicidal properties. The biological and chemical properties of pesticide derivatives are depending on its structure, especially the structural configuration of the substituted groups. Though the structural activity relationship has been established very earlier, there is not much pesticide report exclusively concerning the microbial degradation. Information currently available on the microbial degradation of pesticides is reviewed with particular respect to microorganisms responsible for the biochemical reactions involved, and to the main degradation products identified. Coverage includes the fate of pesticides in soil and the significance of microbial communities in biodegradation; pesticide effects on soil microorganisms; methods for isolating pesticide degrading microorganisms from the soil environment; biochemical reactions involved in pesticide degradation by microorganisms and; the significance of pure culture studies with microorganisms for the eco-toxicological assessment of pesticides. Total heterotrophic and Methyl parathion degrading bacterial counts of Cauvery river bed, near Erode, Bhavani and Tiruppur were analyzed. The samples were taken from the river sediment on monthly basis from October iv 2007 to November 2008. The total heterotrophic bacterial count was in the range of 12-20 x 104 CFU / gm and the total pesticide degrading bacterial count in the range of 50-90x103 CFU/gm. The pesticide degradation was found to be maximum at a concentration of 5and#956;l of pesticide / ml of medium. Among the pesticide degrading bacterial population Bacillus Sp. was found to be dominant followed by Pseudomonas Sp., Micrococcus Sp. and Yersinia Sp. Methyl parathion is the most commonly used pesticide for pest control in rice fields.
Pagination: xii, 139p.
URI: http://hdl.handle.net/10603/42
Appears in Departments:Department of Chemistry

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abstract.pdfAttached File17.58 kBAdobe PDFView/Open
bonafide certificate.pdf10.59 kBAdobe PDFView/Open
chapter 1.pdf89.5 kBAdobe PDFView/Open
chapter 2.pdf40.78 kBAdobe PDFView/Open
chapter 3.pdf334.9 kBAdobe PDFView/Open
chapter 4.pdf129.98 kBAdobe PDFView/Open
chapter 5.pdf29.45 kBAdobe PDFView/Open
chapter 6.pdf15.96 kBAdobe PDFView/Open
contents.pdf14.83 kBAdobe PDFView/Open
list of figures and abbreviations..pdf18.89 kBAdobe PDFView/Open
list of publications.pdf13.84 kBAdobe PDFView/Open
listof tables.pdf16.26 kBAdobe PDFView/Open
references.pdf42.87 kBAdobe PDFView/Open
title page.pdf22.65 kBAdobe PDFView/Open


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