Within-host interactions of Metarhizium rileyi strains and nucleopolyhedroviruses in Spodoptera frugiperda and Anticarsia gemmatalis (Lepidoptera: Noctuidae).

Autor: Souza ML; Embrapa Genetic Resources and Biotechnology, Brasília, Federal District 70770-917, Brazil., Sanches MM; Embrapa Genetic Resources and Biotechnology, Brasília, Federal District 70770-917, Brazil., Souza DA; Embrapa Genetic Resources and Biotechnology, Brasília, Federal District 70770-917, Brazil., Faria M; Embrapa Genetic Resources and Biotechnology, Brasília, Federal District 70770-917, Brazil., Espinel-Correal C; Corpoica - Research Center Tibaitatá, Mosquera, Cundinamarca 4227300, Colombia., Sihler W; Embrapa Genetic Resources and Biotechnology, Brasília, Federal District 70770-917, Brazil., Lopes RB; Embrapa Genetic Resources and Biotechnology, Brasília, Federal District 70770-917, Brazil. Electronic address: rogerio.lopes@embrapa.br.
Jazyk: angličtina
Zdroj: Journal of invertebrate pathology [J Invertebr Pathol] 2019 Mar; Vol. 162, pp. 10-18. Date of Electronic Publication: 2019 Feb 05.
DOI: 10.1016/j.jip.2019.01.006
Abstrakt: Members of the family Baculoviridae have been quite successfully used as biocontrol agents against some lepidopterans. Likewise, a number of fungi are important natural enemies of these pests. An interesting approach to increase control efficacy could be the combination of a given nucleopolyhedrovirus (NPV) and a fungus, since they possess distinct modes of action. As a first step towards this goal, we assessed the interaction between NPV (either AgMNPV-79 or SfMNPV-6nd) and the entomopathogenic fungus Metarhizium rileyi (either CG1153 or CG381), using Anticarsia gemmatalis and Spodoptera frugiperda as hosts. In sequential applications of these pathogens, per os inoculation of an NPV (leaf discs with 2.5 × 10 4 occlusion bodies) either two days before or two days post-spraying of its counterpart fungal strain (5 × 10 3 conidia.cm -2 sprays) usually resulted in an antagonistic effect. When both pathogens were simultaneously applied at different combined dosages, usually an additive effect was seen. Interestingly, a number of dead larvae showing signs of co-infections (partially with soft integument and partially mummified) were recorded. However, mixes with lower dosages of both pathogens did not cause significantly higher insect mortalities compared to low dosages of the fungus applied alone. The advantages and disadvantages of the simultaneous applications of NPV and M. rileyi aiming at the management of either A. gemmatalis or S. frugiperda were discussed.
(Copyright © 2019 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: