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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
25/01/2006 |
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Data da última atualização: |
25/01/2006 |
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Autoria: |
GODOY, C. V.; AMORIM, L.; BERGAMIN FILHO, A.; SILVA, H. P.; SILVA, W. J.; BERGER, R. D. |
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Título: |
Temporal progress of southern rust in maize under different environmental conditions. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Fitopatologia Brasileira, Brasília, DF, v. 28, n. 3, p. 273-278, maio/jun. 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
The progress of the severity of southern rust in maize (Zea mays) caused by Puccinia polysora was quantified in staggered plantings in different geographical areas in Brazil, from October to May, over two years (1995-1996 and 1996-1997). The logistic model, fitted to the data, better described the disease progress curves than the Gompertz model. Four components of the disease progress curves (maximum disease severity; area under the disease progress curve, AUDPC; area under the disease progress curve around the inflection point, AUDPCi; and epidemic rate) were used to compare the epidemics in different areas and at different times of planting. The AUDPC, AUDPCi, and the epidemic rate were analyzed in relation to the weather (temperature, relative humidity, hours of relative humidity >90%, and rainfall) and recorded during the trials. Disease severity reached levels greater than 30% in Piracicaba and Guaíra in the plantings between December and January. Lower values of AUDPC occurred in later plantings at both locations. The epidemic rate was positively correlated (P < 0.05) with the mean daily temperatures and negatively correlated with hours of relative humidity >90%. The AUDPC was not correlated with any weather variable. The AUDPCi was negatively related to both variables connected to humidity, but not to rain. Long periods (mostly >13 h day-1) of relative humidity >90% (that corresponded to leaf wetness) occurred in Castro. Severity of southern rust in maize has always been low in Castro, thus the negative correlations between disease and the two humidity variables. MenosThe progress of the severity of southern rust in maize (Zea mays) caused by Puccinia polysora was quantified in staggered plantings in different geographical areas in Brazil, from October to May, over two years (1995-1996 and 1996-1997). The logistic model, fitted to the data, better described the disease progress curves than the Gompertz model. Four components of the disease progress curves (maximum disease severity; area under the disease progress curve, AUDPC; area under the disease progress curve around the inflection point, AUDPCi; and epidemic rate) were used to compare the epidemics in different areas and at different times of planting. The AUDPC, AUDPCi, and the epidemic rate were analyzed in relation to the weather (temperature, relative humidity, hours of relative humidity >90%, and rainfall) and recorded during the trials. Disease severity reached levels greater than 30% in Piracicaba and Guaíra in the plantings between December and January. Lower values of AUDPC occurred in later plantings at both locations. The epidemic rate was positively correlated (P < 0.05) with the mean daily temperatures and negatively correlated with hours of relative humidity >90%. The AUDPC was not correlated with any weather variable. The AUDPCi was negatively related to both variables connected to humidity, but not to rain. Long periods (mostly >13 h day-1) of relative humidity >90% (that corresponded to leaf wetness) occurred in Castro. Severity of southern rust in maize has always b... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02146naa a2200181 a 4500
001 1468885
005 2006-01-25
008 2003 bl uuuu u00u1 u #d
100 1 $aGODOY, C. V.
245 $aTemporal progress of southern rust in maize under different environmental conditions.
260 $c2003
520 $aThe progress of the severity of southern rust in maize (Zea mays) caused by Puccinia polysora was quantified in staggered plantings in different geographical areas in Brazil, from October to May, over two years (1995-1996 and 1996-1997). The logistic model, fitted to the data, better described the disease progress curves than the Gompertz model. Four components of the disease progress curves (maximum disease severity; area under the disease progress curve, AUDPC; area under the disease progress curve around the inflection point, AUDPCi; and epidemic rate) were used to compare the epidemics in different areas and at different times of planting. The AUDPC, AUDPCi, and the epidemic rate were analyzed in relation to the weather (temperature, relative humidity, hours of relative humidity >90%, and rainfall) and recorded during the trials. Disease severity reached levels greater than 30% in Piracicaba and Guaíra in the plantings between December and January. Lower values of AUDPC occurred in later plantings at both locations. The epidemic rate was positively correlated (P < 0.05) with the mean daily temperatures and negatively correlated with hours of relative humidity >90%. The AUDPC was not correlated with any weather variable. The AUDPCi was negatively related to both variables connected to humidity, but not to rain. Long periods (mostly >13 h day-1) of relative humidity >90% (that corresponded to leaf wetness) occurred in Castro. Severity of southern rust in maize has always been low in Castro, thus the negative correlations between disease and the two humidity variables.
700 1 $aAMORIM, L.
700 1 $aBERGAMIN FILHO, A.
700 1 $aSILVA, H. P.
700 1 $aSILVA, W. J.
700 1 $aBERGER, R. D.
773 $tFitopatologia Brasileira, Brasília, DF$gv. 28, n. 3, p. 273-278, maio/jun. 2003.
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Registro original: |
Embrapa Soja (CNPSO) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
25/11/2002 |
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Data da última atualização: |
25/11/2002 |
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Autoria: |
ANTONIASSI, R.; ESTEVES, W.; MEIRELLES, A. J. A. |
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Título: |
Refino fisico de oleo de milho. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIENCIA E TECNOLOGIA DE ALIMENTOS, 15., 1996, Pocos de Caldas, MG. Resumos... Pocos de Caldas: SBCTA, 1996. p.197, ref. 520. |
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Idioma: |
Português |
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Thesagro: |
Milho; Óleo Vegetal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00507naa a2200157 a 4500
001 1414638
005 2002-11-25
008 1996 bl --- 0-- u #d
100 1 $aANTONIASSI, R.
245 $aRefino fisico de oleo de milho.
260 $c1996
650 $aMilho
650 $aÓleo Vegetal
700 1 $aESTEVES, W.
700 1 $aMEIRELLES, A. J. A.
773 $tIn: CONGRESSO BRASILEIRO DE CIENCIA E TECNOLOGIA DE ALIMENTOS, 15., 1996, Pocos de Caldas, MG. Resumos... Pocos de Caldas: SBCTA, 1996. p.197, ref. 520.
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