Data/hora: 11/06/2024 12:34:22

Biblioteca(s): | Embrapa Trigo; Embrapa Unidades Centrais.
Data corrente: | 04/08/2016
Data da última atualização: | 04/08/2016
Autoria: | COELHO, M. A. de O.; TORRES, G. A. M.; CECON, P. R.; SANTANA, F. M.
Afiliação: | MAURÍCIO ANTÔNIO DE OLIVEIRA COELHO, EPAMIG; GISELE ABIGAIL MONTAN TORRES, CNPT; PAULO ROBERTO CECON, UFV; FLAVIO MARTINS SANTANA, CNPT.
Título: | Sowing date reduces the incidence of wheat blast disease.
Ano de publicação: | 2016
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 51, n. 5, p. 631-637, maio 2016.
ISSN: | 1678-3921
DOI: | 10.1590/S0100-204X2016000500025
Idioma: | Inglês
Conteúdo: | 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.
Palavras-Chave: | Disease; Índice da doença; Severidade; Tolerância.
Thesagro: | Brusone; Doença; Pyricularia Oryzae; Trigo; Triticum Aestivum.
Thesaurus Nal: | Magnaporthe oryzae; Stress tolerance; wheat.

Categoria do assunto:

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H Saúde e Patologia

URL:

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/146071/1/ID43727-2016PABv51n5p631.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/146135/1/Sowing-date-reduces.pdf

Registro original: | Embrapa Trigo (CNPT)

Exemplares:

CNPT - (43727-1) - UPC - AP - DD -  -  -  - DIS
AI-SEDE - (59847-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS