This study is to evaluate the synergistic effect of joint application of entomopathogenic fungi Beauveria bassiana and chemical insecticides against Plutella xylostella in laboratory, and to provide a new approach for effective control of P. xylostella. Six insecticides were evaluated for their effects on the spore germination rate, mycelial growth, sporulation rate and extracellular protease production of the strain HFW-05 in the laboratory. The results showed that low doses of chemical pesticides had no n...