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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
24/02/2016 |
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Data da última atualização: |
27/02/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SCHWANCK, A. A.; MENESES, P. R.; FARIAS, C. R. J. de; FUNCK, G. R. D.; MAIA, A. de H. N.; PONTE, E. M. del. |
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Afiliação: |
ANDRE AGUIAR SCHWANCK, UFRGS; PRISCILA ROSSATTO MENESES, UFPEL; CANDIDA RENATA JACOBSEN DE FARIAS, UFPEL; GUSTAVO RODRIGO DALTROZO FUNCK, Instituto Riograndense do Arroz; ALINE DE HOLANDA NUNES MAIA, CNPMA; EMERSON MEDEIROS DEL PONTE, UFV. |
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Título: |
Bipolaris oryzae seed borne inoculum and brown spot epidemics in the subtropical lowland rice-growing region of Brazil. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
European Journal of Plant Pathology, Dordrecht, v. 142, n. 4, p. 875-885, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of increasing seed borne incidence levels (0, 3, 6, 12, 24 and 48 %) of Bipolaris oryzae on brown spot epidemics and crop performance was studied in eleven field trials. These trials were conducted at two sites (Bagé ? BA and Cachoeirinha ? CA) in the major rice-growing region of Brazil over three seasons (2008 to 2010). Disease variables assessed over time were disease incidence (INC, %) on leaves prior to flowering, and disease severity (SEV, %) on flag leaves after flowering. Kernel infection (KI, %) by B. oryzae was assessed after harvest. Crop-related variables such as plant population density (PD) and yield (YLD) were also assessed. In only three trials, all in the 2009/10 season, which had well above-normal rainfall in the early season, was the disease found at vegetative stages. In those same trials, a significant effect of seed borne inoculum was found for the area under the disease progress curve of INC and SEV. Overall mean SEV at CA (1.67 %) was higher than at BA (0.22 %). Seed borne inoculum levels did not affect final SEV and KI, which was not correlated between each other. PD was significantly reduced with the increase of seed borne inoculum levels in seven out of eight trials and at levels as high as 48 % (2009/10 season). The seed borne inoculum levels did not affect YLD, although significantly reducing PD, which may be due to the rice having a low population compensated through tillering. The risk of yield loss by sowing B. oryzae-infected seeds seems to be low and the early onset of the disease caused by increased levels of seed borne inoculum was dependent on seasonal weather conditions. MenosThe effect of increasing seed borne incidence levels (0, 3, 6, 12, 24 and 48 %) of Bipolaris oryzae on brown spot epidemics and crop performance was studied in eleven field trials. These trials were conducted at two sites (Bagé ? BA and Cachoeirinha ? CA) in the major rice-growing region of Brazil over three seasons (2008 to 2010). Disease variables assessed over time were disease incidence (INC, %) on leaves prior to flowering, and disease severity (SEV, %) on flag leaves after flowering. Kernel infection (KI, %) by B. oryzae was assessed after harvest. Crop-related variables such as plant population density (PD) and yield (YLD) were also assessed. In only three trials, all in the 2009/10 season, which had well above-normal rainfall in the early season, was the disease found at vegetative stages. In those same trials, a significant effect of seed borne inoculum was found for the area under the disease progress curve of INC and SEV. Overall mean SEV at CA (1.67 %) was higher than at BA (0.22 %). Seed borne inoculum levels did not affect final SEV and KI, which was not correlated between each other. PD was significantly reduced with the increase of seed borne inoculum levels in seven out of eight trials and at levels as high as 48 % (2009/10 season). The seed borne inoculum levels did not affect YLD, although significantly reducing PD, which may be due to the rice having a low population compensated through tillering. The risk of yield loss by sowing B. oryzae-infected seeds ... Mostrar Tudo |
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Palavras-Chave: |
Generalized linear mixed model; Tolerance standards. |
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Thesagro: |
Arroz; Doença de planta; Mancha parda; Modelo matemático; Oryza Sativa. |
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Thesaurus Nal: |
Fungal brown spot; Linear models; Seed pathology. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/140014/1/2015AP044.pdf
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Marc: |
LEADER 02586naa a2200301 a 4500
001 2038437
005 2023-02-27
008 2015 bl uuuu u00u1 u #d
100 1 $aSCHWANCK, A. A.
245 $aBipolaris oryzae seed borne inoculum and brown spot epidemics in the subtropical lowland rice-growing region of Brazil.$h[electronic resource]
260 $c2015
520 $aThe effect of increasing seed borne incidence levels (0, 3, 6, 12, 24 and 48 %) of Bipolaris oryzae on brown spot epidemics and crop performance was studied in eleven field trials. These trials were conducted at two sites (Bagé ? BA and Cachoeirinha ? CA) in the major rice-growing region of Brazil over three seasons (2008 to 2010). Disease variables assessed over time were disease incidence (INC, %) on leaves prior to flowering, and disease severity (SEV, %) on flag leaves after flowering. Kernel infection (KI, %) by B. oryzae was assessed after harvest. Crop-related variables such as plant population density (PD) and yield (YLD) were also assessed. In only three trials, all in the 2009/10 season, which had well above-normal rainfall in the early season, was the disease found at vegetative stages. In those same trials, a significant effect of seed borne inoculum was found for the area under the disease progress curve of INC and SEV. Overall mean SEV at CA (1.67 %) was higher than at BA (0.22 %). Seed borne inoculum levels did not affect final SEV and KI, which was not correlated between each other. PD was significantly reduced with the increase of seed borne inoculum levels in seven out of eight trials and at levels as high as 48 % (2009/10 season). The seed borne inoculum levels did not affect YLD, although significantly reducing PD, which may be due to the rice having a low population compensated through tillering. The risk of yield loss by sowing B. oryzae-infected seeds seems to be low and the early onset of the disease caused by increased levels of seed borne inoculum was dependent on seasonal weather conditions.
650 $aFungal brown spot
650 $aLinear models
650 $aSeed pathology
650 $aArroz
650 $aDoença de planta
650 $aMancha parda
650 $aModelo matemático
650 $aOryza Sativa
653 $aGeneralized linear mixed model
653 $aTolerance standards
700 1 $aMENESES, P. R.
700 1 $aFARIAS, C. R. J. de
700 1 $aFUNCK, G. R. D.
700 1 $aMAIA, A. de H. N.
700 1 $aPONTE, E. M. del
773 $tEuropean Journal of Plant Pathology, Dordrecht$gv. 142, n. 4, p. 875-885, 2015.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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| Registros recuperados : 4 | |
| 1. |  | FARIAS, C. R. J. de; ROSA, A. P. S. A. da; PIEROBOM, C. R.; DEL PONTE, E. M. Levantamento regional e identificação de Bipolaris spp. associadas às sementes de arroz no Estado do Rio Grande do Sul, Brasil. Ciência Rural, Santa Maria, v. 41, n. 3, p. 369-372, mar. 2011.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 3. | | SCHWANCK, A. A.; MENESES, P. R.; FARIAS, C. R. J. de; FUNCK, G. R. D.; MAIA, A. de H. N.; PONTE, E. M. del. Bipolaris oryzae seed borne inoculum and brown spot epidemics in the subtropical lowland rice-growing region of Brazil. European Journal of Plant Pathology, Dordrecht, v. 142, n. 4, p. 875-885, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 4 | |
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