1Key Laboratory of Environment Friendly Management on Fruit and Vegetable Pests in North China（Co-construction by Ministry and Province），Ministry of Agriculture and Rural Aff airs，Institute of Plant Protection，Beijing Academy of Agricultural and Forestry Sciences，Beijing 100097，China；2College of Plant Protection，China Agricultural University，Beijing 100193，China；3College of Agriculture and Forestry Technology，Hebei North University，Zhangjiakou 075000，Hebei，China；4Beijing Station of Plant Protection，Beijing 100029，China
Abstract：In order to determine the control effi cacy of brofl anilide against Tuta absoluta，the laboratory toxicity and control effi cacy in the fi eld were evaluated by leaf-dipping method in the laboratory，spray test and root irrigation test in the fi eld. The results of laboratory toxicity showed that the t oxicity of brofl anilide against T. absoluta was higher than that of chlorantraniliprole，with the LC50 of 0.707 mg · L-1．The results of spray test and the root irrigation test showed that brofl anilide has a good control efficacy on T. absoluta．The control efficacies of 100 g · L-1 brofl anilide SC in the spray test and the root irrigation test were more than 79% and 60% after 7 d，respectively，which were signifi cantly higher than control efficacies of 200 g · L-1 chlorantraniliprole SC，150 g · L-1indoxacarb SC，and 10% spinosad SC．In summary，100 g · L-1 brofl anilide SC had good potential and value for controlling T. absoluta in the field.
