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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
24/02/2016 |
Data da última atualização: |
27/02/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
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. |
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. |
Título: |
Bipolaris oryzae seed borne inoculum and brown spot epidemics in the subtropical lowland rice-growing region of Brazil. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
European Journal of Plant Pathology, Dordrecht, v. 142, n. 4, p. 875-885, 2015. |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Generalized linear mixed model; Tolerance standards. |
Thesagro: |
Arroz; Doença de planta; Mancha parda; Modelo matemático; Oryza Sativa. |
Thesaurus Nal: |
Fungal brown spot; Linear models; Seed pathology. |
Categoria do assunto: |
-- |
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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Embrapa Meio Ambiente (CNPMA) |
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4. | | PEREIRA, W. A.; SÁVIO, F. L.; DIAS, D. C. F. dos S.; CRUZ, C. D.; BORÉM, A. Fluxo gênico recíproco entre cultivares de soja convencional e geneticamente modificada. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 47, n. 2, p. 227-236, fev. 2012. Título em inglês: Reciprocal gene flow between conventional and genetically modified soybean cultivars.Biblioteca(s): Embrapa Unidades Centrais. |
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10. | | SANTOS, Y. D.; PEREIRA, W. A.; PAULA, C. M. P. de; RUME, G. de C.; LIMA, A. A.; CHALFUN-JUNIOR, A.; SOUZA SOBRINHO, F. de; TECHIO, V. H. Epigenetic marks associated to the study of nucleolar dominance in Urochloa P. Beauv. Plant Molecular Biology Reporter, v. 38, p. 380-393, 2020.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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13. | | OTSUKA, M. Y. F.; SILVA, O. M. A. e; CURSINO, L. H. S.; PEREIRA, W. A.; MARINHO-PRADO, J. S.; PARANHOS, B. A. G. Prospecção de potenciais bioagentes de controle de Bactrocera carambolae Drew & Hancock (Diptera: Tephritidae). In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMIÁRIDO, 16., 2022, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2022. p. 54-55. (Embrapa Semiárido. Documentos, 308).Tipo: Resumo em Anais de Congresso |
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