杆状病毒(Baculovirus)是一类特异性感染节肢动物的环状双链DNA病毒,是野外控制害虫种群的重要生物因子,并已被开发为一种生物杀虫剂加以应用。杆状病毒感染昆虫宿主并不一定导致昆虫死亡,其持续感染(per-sistent infection)在昆虫种群中普遍存在,且在某些刺激条件下,持续感染可被激活为增殖性感染并引发病毒流行病爆发。因此,杆状病毒持续感染对昆虫种群动力学以及病毒流行病学的研究具有重要意义。 Baculovirus, a group of circular double-stranded DNA viruses that specifically infect arthropods, is an important biological factor that controls pests in the wild and has been developed as a biopesticide. Baculovirus infection of insect hosts does not necessarily lead to death of insects, and their per-sistent infection is prevalent in insect populations and under certain stimulation conditions, persistent infection can be activated as a proliferative infection and trigger a viral spread Outbreak. Therefore, persistent infection of baculovirus is of great significance to the study of insect population dynamics and virus epidemiology.