Data/hora: 16/06/2024 09:39:49

Biblioteca(s): | Embrapa Hortaliças; Embrapa Soja.
Data corrente: | 16/05/2018
Data da última atualização: | 17/05/2018
Autoria: | LOURENÇO JUNIOR, V.; TAKAKI, R. K.; NUNES, M. V.; BORSATO, L. C.; MOITA, A. W.; FOLONI, J. S. S.; OLIVEIRA, D.
Afiliação: | VALDIR LOURENCO JUNIOR, CNPH; R. K. Takaki, Instituto Agronômico do Paraná.; M. V. Nunes, Instituto Agronômico do Paraná; L.C. Borsato, Instituto Agronômico do Paraná; ANTONIO WILLIAMS MOITA, CNPH; JOSE SALVADOR SIMONETI FOLONI, CNPSO; D. OLIVEIRA, Instituto Agronômico do Paraná.
Título: | Effect of the sowing date and cultivar reaction on the gray mold progress on castor bean cultivars.
Ano de publicação: | 2018
Fonte/Imprenta: | Crop Protection, v. 110, p. 214-220, Aug. 2018.
ISSN: | 0261-2194
DOI: | https://doi.org/10.1016/j.cropro.2017.07.022
Idioma: | Inglês
Conteúdo: | Amphobotrys ricini, the causal agent of gray mold, is the most important plant pathogen of castor bean. As there are no effective control measures for gray mold, the objective of this study was to evaluate the progress of the disease on representative castor bean cultivars (BRS Energia, IAC Guarani, and IAC 2028) sown in October, November, and December in Paraná a state, Brazil. Field experiments were conducted under minimum tillage in the Instituto Agronômico do Paraná a Research Station in the 2010/11 and 2011/12 seasons. Evaluations of gray mold incidence and severity were initiated at the onset of first disease symptoms on castor bean bunches. Bunch weight was estimated. The weather conditions were favorable to gray mold epidemics in both planting seasons. A significant interaction between sowing dates and cultivar genotypes was found for the area under the disease progress curve of gray mold by incidence (AUGMI) and severity (AUGMS). Cultivar IAC Guarani sown in December 2010 and October 2011 had the lowest values of AUGMI and AUGMS. Highest values of AUGMI and AUGMS were estimated for cv. BRS Energia in both seasons. Although there were no significant interactions between sowing dates and cultivar genotypes, highest bunch weights were found with cvs. IAC Guarani and IAC 2028 in the 2010/11 season. However, there were no differences for bunch weights among cultivars in the 2011/12 season. Therefore, cultivar IAC Guarani is a suitable option for castor bean production in Paraná a state, combining lowest susceptibility and highest yields.
Palavras-Chave: | Amphobotrys ricini.
Thesagro: | Doença de Planta; Mamona; Mofo Cinzento; Resistência; Ricinus Communis.
Thesaurus Nal: | Epidemiology; Gray mold; Pest resistance; Plant cultural practices; Plant diseases and disorders.

Categoria do assunto:

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X Pesquisa, Tecnologia e Engenharia

Registro original: | Embrapa Hortaliças (CNPH)

Exemplares:

CNPH - (40780-1) - UPC - AP - DD -  -  -  - DIS
CNPSO - (38739-1) - UPC - AP - DD -  -  -  - DIS