Data/hora: 20/06/2024 22:21:30

Biblioteca(s): | Embrapa Meio Ambiente; Embrapa Recursos Genéticos e Biotecnologia.
Data corrente: | 30/08/2022
Data da última atualização: | 14/07/2023
Autoria: | MASCARIN, G. M.; MARINHO-PRADO, J. S.; ASSALIN, M. R.; MARTINS, L. G.; BRAGA, E. S.; TASIC, L.; DITA RODRIGUES, M. A.; LOPES, R. B.
Afiliação: | GABRIEL MOURA MASCARIN, CNPMA; JEANNE SCARDINI MARINHO PRADO, CNPMA; MARCIA REGINA ASSALIN, CNPMA; LUCAS GELAIN MARTINS, UNIVERSIDADE ESTADUAL DE CAMPINAS; ERIK SOBRINHO BRAGA, UNIVERSIDADE ESTADUAL DE CAMPINAS; LJUBICA TASIC, UNIVERSIDADE ESTADUAL DE CAMPINAS; MIGUEL ANGEL DITA RODRIGUEZ, BIODIVERSITY INTERNATIONAL; ROGERIO BIAGGIONI LOPES, Cenargen.
Título: | Natural occurrence of Beauveria caledonica, pathogenicity to Cosmopolites sordidus and antifungal activity against Fusarium oxysporum f. sp. cubense.
Ano de publicação: | 2022
Fonte/Imprenta: | Pest Management Science, v. 78, n. 11, p. 4458-4470, 2022.
ISSN: | 1526-4998
DOI: | https://doi.org/10.1002/ps.7063
Idioma: | Inglês

Conteúdo:

Abstract: Entomopathogenic fungi can provide a set of ecological services, such 
      as suppressing arthropod pests and plant pathogens. In this study, novel 
      indigenous Beauveria caledonica (Bc) strains were isolated from naturally 
      infected banana weevils (Cosmopolites sordidus) occurring in commercial banana 
      plantations in Brazil. The prevalence of infection by Bc strains on 
      field-caught C. sordidus ranged from 1.3% to 12.9%. Similar to the Beauveria 
      bassiana strains tested, none of the Bc strains caused more than 50% weevil 
      mortality at a concentration of 1 x 10(8) conidia ml(-1) . Bc strain CMAA1810 
      caused the highest mortality in C. sordidus and had enhanced insecticidal 
      activity when formulated with an emulsifiable oil. In paired co-culture assays, 
      this same strain showed a significant growth-inhibitory effect on the causal 
      agent of Fusarium banana wilt (Fusarium oxysporum f. sp. cubense, Foc) of twofold 
      magnitude compared with the control. Cell-free crude filtrates derived from the 
      red-pigmented culture broth of Bc (CMAA1810) strongly reduced Foc conidial 
      viability, and this inhibitory activity was inversely related to the age of the 
      Bc culture. Crude concentrated filtrates from 4-day-old cultures exhibited the 
      strongest antifungal activity (13-fold) compared with untreated Foc conidia. The 
      abundant compound identified in the crude filtrate of Bc was oosporein 
      (1,4-dibenzoquinone) present at a concentration of 0.829 ± 0.018 mg g(-1) dry 
      matter, and the antifungal activity of the filtrate was demonstrated. 
      These results indicated that Bc strains might have the potential to manage both 
      C. sordidus and Foc, two of the major phytosanitary problems in banana crops 
      worldwide. Further research under field conditions using suitable formulations of 
      virulent Bc strains in combination with the metabolite oosporein is needed to 
      evaluate their efficacy in the management of C. sordidus and Foc in banana 
      plantations.

Palavras-Chave: | Banana weevils.
Thesagro: | Beauveria Bassiana; Cosmopolites Sordidus; Doença de Planta; Fungo Entomógeno; Fungo Para Controle Biológico; Fusarium Oxysporum Cubense; Murcha de Fusarium; Praga de Planta.
Thesaurus Nal: | Antifungal properties; Bananas; Biological control agents; Entomopathogenic fungi; Fusarium wilt.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Meio Ambiente (CNPMA)

Exemplares:

CNPMA - (17214-1) - UPC - AP - DD -  -  -  - DIS
CENARGEN - (38910-1) - UPC - AP - DD -  -  -  - DIS