The effects of fipfonil (Regent), methoxyfenozide, chlorfennapyr, flufenoxuron (Cascade)and beta-cypermethrin on the Px04 isolate of Paecilomyces javanicus were assayed in the laboratory. And the combinative virulence of the 5 insecticides with Px04 were tested. When the concentrations of chemical insecticides were higher than 10 times of field recommended dosage, chlorfennapyr (1000 mg/L), fipfonil (500 mg/L) and methoxyfenozide (2400 mg/L) had no negative effect on the production and germination of conidia spores and mycelia growth ...