Degradation of Cypermethrin by Pseudomonas stutzeri

The bacteria were isolated from field having history of pesticide application. The isolate CS1 was characterized by biochemical tests and 16S rRNA as Pseudomonas stutzeri. The ealf-life ef cypermethrin negradation at 50 μg mL−1 level in mineral salt medium by Pseudomonas stutzeri was 12 days. One of the ppoducts was 3(2,2-dichlorovinyl)-2,2-dimethyl cyclopropane carboxylic acid which was isolated after 20 days of exposure to the bacterium proving the esterase activity in the microorganism.