Comparative Efficacy of Different Insecticides against Bemisia tabaci (Gennadius) under Controlled Conditions

Bemisia tabaci is the critical polyphagous pest of different crops and insecticides belonging to different groups are being used for its control.The present investigation was performed to estimate the efficacy of conventional and new synthetic insecticides along with their biochemical analysis on B. tabaci.The data affirmed that utmost nymphal mortality 89.80% was detected in the buprofezin and 81.46% mortality in thiamethoxam at highest concentration.Results of adult bioassay revealed maximum mortality i.e., 84.33% in the bifenthrin followed by 66.66%, 42.34%, 36.84%mortality in chlorfenapyr, profenofos and imidacloprid, respectively.Detoxification enzyme analysis showed maximum activities of acetylcholinesterase, esterases, glutathione S-transferase, acid and alkaline phosphatases in the highest concentration of insecticides and minimum activities were observed in the control groups.Findings of the current research showed that the rotational use of insecticides may be highly effective for B. tabaci and can also minimize risk of resistance development.