Laphygma exigua H.is an important agricultural pest and difficult to control.Microsporidia are important agents in the natural control of inscet pest populations.A microsporidium causing high mortality level was isolated from larvae of Laphygma exigua H.from suburban of Guangzhou.The microsporidium could also infect larvae of silkworm,Bombyx mori.The microsporidium characteristics of spore morphology,size,surface,ultrastructure and life cycle were studied by optical microscope,SEM and TEM.On the basis data,...