【Objective】To screen out one strain of endophytic fungi which might produce insecticidal secondary metabolites and test its insecticidal activity against Lipaphis erysimi.【Method】Endophytic fungi in insecticidal plants,including Derris elliptica,D. alborubra,D. thyrsiflora and D. hacei,were studied.Endophytic fungi isolated from Derris plants were identified by classical morphological method,and their secondary metabolites were identified using high-performance liquid chromatograph( HPLC) to obtain the obje...