The study on transfection of four insect cell lines which involve Spodoptera liturs(SL), Bombyx mori(Bm), Spodoptera frugiperda(SF)and Pieris rapae (pr)with DNA of Philosamia cynthia ricini Nuclear Polyhedrosis Virus (PcrNPV)by means of calcium phosphate coprecipitation method showed: (a)the polyhedral, particles in SF and Bm cell lines transfected with DNA of perNPV were observed under a light microscope, and no polyhedra appeared in the nuclei of SL and Pr cell lines transfected with PcrNPV DNA. (b)four insect cell lines were detected with an electron microscope, the polyhedra and virions of...
