Objective An experiment was carried out to study the effects of different profenofos levels on the activities of superoxide dismutase(SOD) and the content of malondialdehyde(MDA) in Rapes.Methods The activities of SOD and the content of MDA were determinated by visible spectrophotometry.Results The results showed that the activities of SOD and the content of MDA were all increased but and reduced along with the response time.Conclusion The activities of SOD and the content of MDA which were all highly improved could serve as the sensitive biomarkers under profenofos stress in rapes.

虫啉(Imidacloprid),1-(6-氯吡啶-3-基甲基)-N-硝基亚咪唑烷-2-基胺,它是一种新型高效氯代烟碱类内吸性广谱杀虫剂,其胃毒与触杀作用较为突出.吡虫啉作用机制独特,表现为极高的触杀、胃毒及优良的内吸作用,它能选择性地抑制昆虫神经系统中的乙酰胆碱受体,并能与昆虫中枢神经系统中烟酸乙酰胆碱受体有效结合,从而破坏昆虫中枢神经的正常传导,杀死害虫.