Occurrence of Meloidogyne morocciensis parasitizing beetroot in Brazil

Abstract

Beetroot plants cv. Boro exhibiting multiple root galls similar to those symptoms associated with root-knot nematodes (RKNs) were detected in the municipality of Rio Grande, Rio Grande do Sul state, Brazil. The nematode identification was based on an integrative taxonomy. Perineal patterns of females were similar to Meloidogyne arenaria and M. incognita whereas isoenzymatic phenotypes α-esterase A3 and malate dehydrogenase N1 were typical to M. morocciensis. Measurements of second-stage juveniles and males corresponded to the same species. Beetroot plants inoculated with 2.000 specimens of RKN showed reduction of fresh weight of shoots (37%) and roots (30%). The nematode reproduction factor was 11.9. Our study provides the first evidence that M. morocciensis causes root-knot disease in beetroot cv. Boro in Brazil and elsewhere.

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Acknowledgements

We gratefully acknowledge the financial support of the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) of Brazil.

Funding

This study was supported by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) - Brazil.

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All authors contributed to the study conception and design. All authors revised all previous versions of the manuscript.

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Correspondence to Cielo Pamela Machaca-Calsin.

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The authors declare that this paper has not been submitted to more than one journal for simultaneous consideration. There was no conflict of interest among authors and consent to submit has been received explicitly from all co-authors and the institute where the work has been carried out.

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Machaca-Calsin, C.P., da Silva, W.R., da Silva Grinberg, P. et al. Occurrence of Meloidogyne morocciensis parasitizing beetroot in Brazil. Eur J Plant Pathol 160, 239–242 (2021). https://doi.org/10.1007/s10658-021-02231-w

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Keywords

  • Root-knot nematode
  • Detection
  • Beta vulgaris
  • Root galls