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dc.contributor.authorSCHWANCK, A. A.pt_BR
dc.contributor.authorMENESES, P. R.pt_BR
dc.contributor.authorFARIAS, C. R. J. dept_BR
dc.contributor.authorFUNCK, G. R. D.pt_BR
dc.contributor.authorMAIA, A. de H. N.pt_BR
dc.contributor.authorPONTE, E. M. delpt_BR
dc.date.accessioned2016-02-24T11:11:11Zpt_BR
dc.date.available2016-02-24T11:11:11Zpt_BR
dc.date.created2016-02-24pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationEuropean Journal of Plant Pathology, Dordrecht, v. 142, n. 4, p. 875-885, 2015.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1038437pt_BR
dc.descriptionThe 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.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectGeneralized linear mixed modelpt_BR
dc.subjectTolerance standardspt_BR
dc.titleBipolaris oryzae seed borne inoculum and brown spot epidemics in the subtropical lowland rice-growing region of Brazil.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-02-24T11:11:11Zpt_BR
dc.subject.thesagroArrozpt_BR
dc.subject.thesagroMancha pardapt_BR
dc.subject.thesagroDoença de plantapt_BR
dc.subject.thesagroModelo matemáticopt_BR
dc.subject.thesagroOryza Sativapt_BR
dc.subject.nalthesaurusSeed pathologypt_BR
dc.subject.nalthesaurusFungal brown spotpt_BR
dc.subject.nalthesaurusLinear modelspt_BR
riaa.ainfo.id1038437pt_BR
riaa.ainfo.lastupdate2016-02-24pt_BR
dc.contributor.institutionANDRE 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.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CNPMA)

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