Reação de cultivares de braquiária (Urochloa spp.) à espécies de Pyricularia associadas à brusone

Autores

  • Loane Dantas Krug Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil https://orcid.org/0000-0003-3051-3897
  • Suellen de Sousa Moreira Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil https://orcid.org/0009-0001-0680-3109
  • Samara Nunes Campos Vicentini Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil https://orcid.org/0000-0003-0383-4097
  • Tiago Calves Nunes Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil https://orcid.org/0000-0002-1446-811X
  • Lucas Matheus De Deus Paes Gonçalves Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil https://orcid.org/0009-0000-4828-6421
  • Vanina Lilian Castroagudín Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil https://orcid.org/0000-0002-4843-5754
  • Sanzio Carvalho Lima Barrios Embrapa Gado de corte, Campo Grande, MS, Brazil https://orcid.org/0000-0002-5490-4959
  • Paulo Cezar Ceresini Department of Crop Protection, Agricultural Engineering and Soils, Graduate Program in Agronomy, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil https://orcid.org/0000-0003-2381-2792

DOI:

https://doi.org/10.1590/1983-21252024v3712127rc

Palavras-chave:

Pyricularia grisea. Pyricularia pennisetigena. Pyricularia oryzae linhagem Triticum. Pyricularia urashimae. Resistência varietal.

Resumo

Os fungos do gênero Pyricularia possuem ampla gama de plantas hospedeiras e são capazes de infectar mais de 50 espécies de gramíneas, causando a doença brusone, com danos às espigas. Espécies da forrageira braquiária (Urochloa spp.) podem ser hospedeiras deste gênero de fungo e podem ser importante fonte de inóculo do patógeno para outras culturas agrícolas afetadas pela brusone, especialmente o trigo. O objetivo deste estudo foi determinar a reação de nove cultivares de Urochloa aos patógenos Pyricularia oryzae linhagem Triticum (PoT1), P. pennisetigena, P. urashimae e P. grisea. Foi avaliado também a virulência de sete raças de PoTl á cultivares de braquiária. Houve variação na patogenicidade e virulência das espécies de Pyricularia e raças de PoTl em diferentes cultivares de braquiária. As cultivares Ipyporã, BRS Tupi e Xaraés foram as mais resistentes às diferentes espécies de patógenos da brusone, e raças de PoTl. Portanto, recomenda-se o cultivo dessas variedades em áreas adjacentes às de trigo ou na integração lavoura-pecuária.

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Publicado

27-03-2024

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Artigo Científico