Phytoremediation has been reported to be an effective method for remediating various organic contaminants in soil, such as DDT, dielderin, lindane, polychlorinated biphenyls, and polycyclic aromatic hydrocarbons . Some microorganisms are known to degrade endosulfan sulfate. For example, Klebsiella oxytoca KE-8 was able to utilize endosulfan sulfate (initial concentration 173 mg 1) as a solo carbon source. This bacterial strain could degrade endosulfan sulfate with a degradation constant of 0.2465 day