Incidence of Microdochium oryzae in rice seeds in the main production areas in Paraguay
DOI:
https://doi.org/10.32480/rscp.2021.26.2.177Keywords:
Oryza sativa, Microdochium oryzae, incidence, seed healthAbstract
Rice crop in Paraguay is affected by several fungal diseases and among these, the leaf rice scald caused by Microdochium oryzae. In recent years, an increase of the disease has been observed as well as the presence of the fungus in the seed, the objective of this research was to quantify its incidence in seed samples from the main producing area of the country. Rice seed samples of the IRGA 424 variety were collected in the districts of Itapúa, Misiones and Caazapá provinces, and the filter paper paper method was used to assess the seed health. The pathogen was detected in seeds from all the samples analyzed, with average incidences between 0.15 and 15%. 53% of the samples analyzed had an average incidence of 2.32% of the pathogen, while only 3% would have an average incidence of 20.26%. These results indicate the need to analyze seeds of other varieties of rice, considering the importance of the seed as a source of inoculum for the disease.
Downloads
References
(1) Ministerio de Agricultura y Ganadería, MAG. Síntesis estadísticas de Producción agropecuaria [Internet]. 2021 [Acceso 20 ene 2021]. Disponible5en: http://www.mag.gov.py/index.php/institucion/dependencias/sintesis-estadistica
(2) Hernandez-Restrepo M, Groenewald JZ, Crous PW. Taxonomic and phylogenetic re-evaluation of Microdochium, Monographella and Idriella. Persoonia [Internet]. 2016 [Acceso 20 feb 2021]. Disponible en: https://dx.doi.org/10.3767%2F003158516X688676
(3) Ou SA. Rice diseases. 2nd. ed. Kew: Surrey, England; 1985. 380 p.
(4) Webster RK, Gunnell PS. Compendium of Rice Diseases. St. Paul, Minnesota, USA: The American Phytopathological Society; 1992, 92 p.
(5) Quintana de Viedma L, Gutiérrez S, Maidana M, Arriola M, Morínigo K. Incidencia de patógenos causantes de manchas foliares del cultivo del arroz en la Campaña 2014/2015 en Paraguay. Revista sobre Estudios e Investigaciones del Saber Académico [Internet]. 2016 [Acceso 20 abril 2021];10(10):103-106. Disponible en: http://publicaciones.uni.edu.py/index.php/eisa/article/view/122/97
(6) Mazzanti de Castañón MA, Gutiérrez SA. Enfermedades del cultivo del arroz en Argentina. Fitopatología Brasileira, 2001(Supl.):471.
(7) Filippi MC, Prabhu, AS, da Silva, GB. Escaldadura do arroz e seu controle. Circular Técnica 72 Embrapa Arroz e Feijão [Internet]. Goiás; 2005 [Acceso 10 de diciembre 2020]. Disponible: https://www.agencia.cnptia.embrapa.br/Repositorio/circ_72_000fyudgqsb02wx5ok076ralotbs06q1.pdf
(8) Mew TW, Misra, JK. A Manual of Rice Seed Health Testing. Manila, Philippines, International Rice Research Institute. [Internet]; 1994 [Acceso 12 diciembre 2020]. 113 p; disponible en https://www.semanticscholar.org/paper/A-manual-of-rice-seed-health-testing.-Mew-Misra/e94672985bb24034e03a281849d08e4f9283809b
(9) Mew TW, Gonzales P. A handbook of rice seedborne fungi. Los Baños, Laguna, International Rice Research Institute. [Internet]. 2002 [Acceso 12 diciembre 2020]. 83 p. Disponible en: http://books.irri.org/9712201740_content.pdf
(10) Scheidt BT, García, J, Trezzi Casa R, Medeiros Cohelo CM. Microdochium albescens may affect the physiological quality of irrigated rice cultivar seeds. Ciência Rural [Internet]. 2021; [Acceso 20 abril 2021];51(7):1-5. Disponible en: https://www.scielo.br/scielo.php?pid=S0103-84782021000700152&script=sci_arttext&tlng=en
(11) Quintana L, Gutiérrez S, Ortiz A. Prevalence of fungi associated with rice leaf spot in the main rice-growing areas in Paraguay. Australian Journal of Basic and Applied Sciences [Internet]. 2019 [Acceso 15 febrero 2021];(8):60-63. Disponible en: http://ajbasweb.com/old/ajbas/2019/August/60-63(9).pdf
(12) Quintana L, Gutiérrez S, Ortíz, A. Microdochium oryzae associated with rice leaf scald disease in Paraguay. Australian Journal of Basic and Applied Sciences [Internet]. 2018 [Acceso 20 abril 2021]:12(7):56-58. Disponible en: http://www.ajbasweb.com/old/ajbas/2018/July/56-58(8).pdf
(13) Mathur SB, Kongsdal O. Common laboratory seed health testing methods for detecting fungi. 3rd ed. Copenhagen, Denmark; 2003, 425 p.
(14) Gutiérrez SA, Carmona MA, Reis EM. Estudio preliminar sobre métodos de detección de Microdochium oryzae en semillas de arroz. Tropical Plant Pathology. 2009;4:42-44.
(15) Franco DF, Ribeiro AS, Nunes C, Ferreira E. Fungos associados a sementes de arroz irrigado no Rio Grande do Sul. Revista Brasileira de Agrociência. 2001;7:235-236. Disponible en: http://www.ufpel.tche.br/faem/agrociencia/v7n3/artigo16.pdf
(16) Farias CRJ de, Afonso Schneid AP, Brancão Fernandes, M, Pierobom CR. Incidência de fungos associados a sementes de arroz em seis regiões produtoras do Rio Grande do Sul. Revista Brasileira de Agrociência. 2007;14:487-490. Disponible en: https://periodicos.ufpel.edu.br/ojs2/index.php/CAST/article/viewFile/1395/1381
(17) Malavolta VMA, Arruda Soligo E, Dias Luiz EA, Bastos CR. Incidência de fungos e quantificação de danos em sementes de genótipos de arroz. Summa Phytopathologica. 2007;33:280-286. Disponible en: https://www.scielo.br/j/sp/a/5GYCcjyzQcp8V59dqjGbqsN/?lang=pt
Downloads
Published
Issue
Section
License
Copyright (c) 2021 Revista de la Sociedad Científica del Paraguay
This work is licensed under a Creative Commons Attribution 4.0 International License.
El/los autores autorizan a la Revista de la Sociedad Científica del Paraguay a publicar y difundir el articulo del cual son autores, por los medios que considere apropiado.
