Comparative Pathogenesis of Generalist AcMNPV and Specific RanuNPV in Larvae of Rachiplusia nu (Lepidoptera: Noctuidae) Following Single and Mixed Inoculations | Zendy

Cecilia Decker Franco | Zendy; Catalina Taibo | Zendy; Julio A. Di Rienzo | Zendy; Victoria Alfonso | Zendy; Joel D. Arneodo | Zendy

Open Access

Comparative Pathogenesis of Generalist AcMNPV and Specific RanuNPV in Larvae of Rachiplusia nu (Lepidoptera: Noctuidae) Following Single and Mixed Inoculations

Author(s) -

Cecilia Decker Franco,

Catalina Taibo,

Julio A. Di Rienzo,

Victoria Alfonso,

Joel D. Arneodo

Publication year - 2021

Publication title -

journal of economic entomology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.818

H-Index - 101

eISSN - 1938-291X

pISSN - 0022-0493

DOI - 10.1093/jee/toab010

Subject(s) - biology , autographa californica , noctuidae , lepidoptera genitalia , inoculation , larva , virology , instar , pathogenicity , biological pest control , virus , bioassay , veterinary medicine , microbiology and biotechnology , botany , horticulture , spodoptera , ecology , gene , biochemistry , recombinant dna , medicine

The South American soybean pest, Rachiplusia nu (Guenée), is naturally infected by Autographa californica multiple nucleopolyhedrovirus (AcMNPV) and Rachiplusia nu nucleopolyhedrovirus (RanuNPV). We compared their pathogenicity to fourth-instar R. nu larvae, by evaluating time to death and virus spread throughout the tissues in single and mixed infections. Bioassays showed that generalist AcMNPV had a faster speed of kill than specific RanuNPV, while the mixed-virus treatment did not statistically differ from AcMNPV alone. Histopathology evidenced similar tissue tropism for both viruses, but co-inoculation resulted in mostly AcMNPV-infected cells. In sequential inoculations, however, the first virus administered predominated over the second one. Implications on baculovirus interactions and biocontrol potential are discussed.

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