Microbial degradation has attracted more and more attention to be an effective way to effectively treat pesticide in the environment and save treatment costs. However, the specific degradation mechanism and the influence of microorganisms on the environment of some pesticides are still unclear. In this study, the Serratia marcescens BCD1 (PV133529) which isolated from the blueberry soil showed a 20 days degradation rate of 93.14% and 91.09% for 50 mg/L and 250 mg/L λ-cyhalothrin, respectively. Product analysis revealed the pathway of λ-cyhalothrin degradation by Serratia marcescens BCD1, including the removal of cyano groups and the cleavage of ester bonds. The morphological changes of BCD1 in the presence of different concentrations of λ-cyhalothrin were observed by SEM electron microscopy, and the cell wall of BCD1 was wrinkled and deformed, and the cell length was shortened under the stress of λ-cyhalothrin. This study indicates that BCD1 as a promising microorganism for λ-cyhalothrin residue and improve blueberry quality in a treatment setting.
Wang et al. (Sat,) studied this question.