Effects of cinnamaldehyde on fumigation and protective enzyme activity in Tribolium castaneum adults
To determine the insecticidal activity of cinnamaldehyde against Tribolium castaneum at various developmental stages and its impact on several protective enzymes in T.castaneum adults,the fumigation effect of cinnamaldehyde on young larvae,old larvae,pupae,and adults were investigated using a conical flask fumigation method,and the activities of superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT)in the adults exposed to cinnamaldehyde at a median lethal concentration(LC50)were measured.The results showed that the fumigation effect was correlated with the concentration of cinnamaldehyde as well as the developmental stage of T.castaneum.After exposed to 2.5 μL/L of cinnamaldehyde for 72 h,the best fumigation effect was observed on the adults,followed by the larvae.The activities of SOD,POD,and CAT reached the highest level when treated with LC50(24 h)of cinnamaldehyde for 48,12 h,and 36 h,respectively;the activities of SOD,POD,and CAT were 2.70-,1.03-,and 1.96-fold of those in the control group,respectively.The POD activity in treated adults was lower than that in the control group when fumigated for 36 h,while SOD and CAT activities were significantly higher than those in the control group when insects were fumigated in flask for 36-60 h and 24-48 h,respectively.In conclusion,cinnamaldehyde fumigation can destroy the dynamic balance in T.castaneum in vivo,resulting in toxic effects.Therefore,cinnamaldehyde has the potential for biological control of T.castaneum.
万方数据
维普
