Relation between Helicoverpa armigera (Hubner) (Lepidoptera/Noctuidae) mortality and entomopathogenic fungi persistence in soybean leaflets

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dc.contributor.authorde Souza, Tamires Doroteo [UNESP]
dc.contributor.authorFernandes, Fabricio Oliveira [UNESP]
dc.contributor.authorSanches, Ariadne Costa [UNESP]
dc.contributor.authordo Nascimento, Joacir [UNESP]
dc.contributor.authorPinto, Antonio Alves [UNESP]
dc.contributor.authorPolanczyk, Ricardo Antônio [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-05-01T13:41:33Z
dc.date.available2022-05-01T13:41:33Z
dc.date.issued2022-12-01
dc.description.abstract​Background: Entomopathogenic fungi have low persistence in the field because of UV light, high temperatures and low humidity. Thus, this study's objective was to correlate the persistence of Beauveria bassiana and Metarhizium anisopliae in soybean leaf by measuring the mortality and sub-lethal effects of Helicoverpa armigera (Hubner) (Lepidoptera/Noctuidae). In the 2017–2018 and 2019–2020 soybean seasons, the experiments were conducted on plots subdivided in a completely randomized design. After spraying each plot with the fungal, either B. bassiana or M. anisopliae, leaves were collected hourly for 8 h after application and transferred to the laboratory. The local air temperature was recorded each time. For persistence assessment, the fungal suspension was prepared from the leaf disks; thereafter, 150 µl of the suspension was removed and poured into a plate. After 72 h of inoculation, colony-forming units (CFUs) were counted. For the mortality test, the leaf disks were placed individually in pots and offered to second instar larvae of H. armigera. The surviving larvae were evaluated for sub-lethal effects and biological parameters. Results: Beauveria bassiana was more persistent than M. anisopliae, which persisted for 3 h in the first year and 5 h in the second year when temperatures were milder; B. bassiana persisted throughout the evaluation period (8 h). The mortality of H. armigera decreased with an increase in the time since application fungal suspension, presenting a range of 86–30% for B. bassiana and 78–4.2% for M. anisopliae. Conclusion: Assessments of sublethal effects showed an inverse correlation between CFUs and parameters such as fertility and weight.en
dc.description.affiliationDepartment of Crop Protection College of Agricultural and Veterinary Sciences São Paulo State University, Rod. Prof. Paulo Donato Castellane km 5, SP
dc.description.affiliationUnespDepartment of Crop Protection College of Agricultural and Veterinary Sciences São Paulo State University, Rod. Prof. Paulo Donato Castellane km 5, SP
dc.identifierhttp://dx.doi.org/10.1186/s41938-022-00508-8
dc.identifier.citationEgyptian Journal of Biological Pest Control, v. 32, n. 1, 2022.
dc.identifier.doi10.1186/s41938-022-00508-8
dc.identifier.issn2536-9342
dc.identifier.issn1110-1768
dc.identifier.scopus2-s2.0-85124400467
dc.identifier.urihttp://hdl.handle.net/11449/234129
dc.language.isoeng
dc.relation.ispartofEgyptian Journal of Biological Pest Control
dc.sourceScopus
dc.subjectFungal control
dc.subjectGreen Muscardine
dc.subjectHelicoverpa armigera
dc.subjectSublethal effects
dc.subjectVirulence
dc.subjectWhite Muscardine
dc.titleRelation between Helicoverpa armigera (Hubner) (Lepidoptera/Noctuidae) mortality and entomopathogenic fungi persistence in soybean leafletsen
dc.typeArtigo
unesp.author.orcid0000-0002-5593-7680[1]

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