Effects of Heliothis virescens ascovirus (HvAV-3e) on a novel host, Crocidolomia pavonana (Lepidoptera: Crambidae)

Journal of Invertebrate Pathology
Matthew SmedeSassan Asgari

Abstract

Ascoviruses are double-stranded DNA viruses which cause fatal disease in lepidopteran host larvae. They induce a unique pathology, causing cleavage of host cells into virion-containing vesicles. With the single exception of Diadromus pulchellus ascovirus, all ascoviruses have been exclusively reported from the Noctuidae. To investigate whether Heliothis virescens AV (HvAV-3e) has a broader host range at the family level, larvae of Crocidolomia pavonana F. (Lepidoptera: Crambidae), a major pest of brassica crops in tropical and sub-tropical regions of the Old World and Australasia, were inoculated with HvAV-3e. Larvae were readily infected by the ascovirus and feeding, growth and survival were significantly affected. However, the milky white discolouration of the haemolymph which is characteristic of ascovirus infection in noctuid hosts was not apparent. In further contrast to infected noctuid host larvae that do not develop to the pupal stage, a significant proportion of infected C. pavonana larvae pupated but all were killed at this stage. Thus, C. pavonana appears to be a semi-permissive host of the ascovirus, the presence of such hosts in the field might be an explanation for the conundrum for the ascovirus-noctuid-wasp rela...Continue Reading

References

Nov 1, 1990·Journal of Invertebrate Pathology·R Govindarajan, B A Federici
Sep 1, 2000·Journal of Theoretical Biology·S A Frank
Nov 14, 2003·Proceedings. Biological Sciences·Miguel López-FerberPrimitivo Caballero
Jun 4, 2005·Genes & Development·Dennis K BideshiBrian A Federici
Dec 1, 1983·Proceedings of the National Academy of Sciences of the United States of America·B A Federici
Apr 13, 2006·Archives of Virology·S Asgari
Mar 22, 2007·The Journal of General Virology·Sassan AsgariAnnette McGrath

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Citations

Jan 12, 2013·PLoS Pathogens·Rodney P Kincaid, Christopher S Sullivan

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