Data/hora: 02/06/2024 09:28:19

Provedor de dados: | 86
País: | Brazil
Título: | Sowing date reduces the incidence of wheat blast disease
Autores: | Coelho,Maurício Antônio de Oliveira; Torres,Gisele Abigail Montan; Cecon,Paulo Roberto; Santana,Flávio Martins.
Data: | 2016-05-01
Ano: | 2016
Palavras-chave: | Magnaporthe oryzae; Pyricularia oryzae; Triticum aestivum; Disease index; Severity; Tolerance.
Resumo: | Abstract: The objective of this work was to assess the effect of sowing date on the intensity of wheat blast disease, as well as the yield losses caused by this disease in different wheat (Triticum aestivum) genotypes. The experiments were conducted in 2013 at the Sertãozinho experimental station of Empresa de Pesquisa Agropecuária de Minas Gerais (Epamig), in the municipality of Patos de Minas, in the state of Minas Gerais, Brazil. Fourteen wheat genotypes and two sowing dates were evaluated. The experimental design was a randomized complete block with three replicates. The evaluated variables were: incidence, severity, thousand grain weight (TGW), grain yield, and yield losses. A disease index (DI) was calculated, based both on the incidence and the severity of the disease, to measure blast intensity in wheat. The sowing date significantly affected DI, TGW, and grain yield. Significant linear correlations were observed between DI and yield losses (0.89), between losses and TGW (-0.85), and between losses and grain yield (-0.93). For wheat blast, DIs greater than or equal to 0.5 indicate potential yield losses equal to or greater than 70%. The EP063030 line and the MGS Brilhante and BRS 264 cultivars are the most tolerant to blast, when exposed to high disease pressure.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000500631

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2016000500025
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.51 n.5 2016
Fonte: | info:eu-repo/semantics/openAccess