Abstract: Densoviruses are single strand DNA viruses which can infect invertebrate hosts such as insects. Infectious virions can be rescued from the host cells after the densoviruses genome transfect into host cells, in additon, the densoviruses genome could inserted into host genome, these two features promoted research of densoviruses uesd as expression vectors. Densoviruses show great potentials in biological control because its host is limited to insects only. This paper reviews research progress on JcDNV, AaeDNV and PfDNV used as expression vectors in details, and densoviruses application in biological control as well as the relevent security issues.

Key words: densoviruses, expression vectors, biological control