Abstract
A current environmental concern is the contamination of aquatic ecosystems due to pesticide discharges from manufacturing plant, agricultural runoff, leaching, accidental spills and other sources. The degradation of synthetic pyrethroids in the environment is an important index in the evaluation of ecological risk of pesticides. Microorganisms play a significant role in detoxifying pesticides in the environment. There are few reports on the degradation of pyrethroid insecticides in soils. This study may provide basis for prevention and control of synthetic pyrethroid, fenvalerate pollution. The present study investigated the potential of the chosen bacterium, a natural isolate Pseudomonas viridiflava isolated from an agricultural field and its degradation efficiency was evaluated by the assessment of various parameters like pH, carbon dioxide, turbidity and esterase activity during the long term and short term degradation process. HPLC analysis revealed that the peaks with different retention time and disappearance of several peaks confirm the degradation of fenvalerate by P. viridiflava. These findings suggest that the utilization of fenvalerate by P .viridiflava may be a feasible treatment option for the removal of pesticides from soil environment.
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