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| 5. |  | SANTOS, E. F. dos; ZANCHIM, B. J.; CAMPOS, A. G de; GARRONE, R. F.; LAVRES JUNIOR, J. Photosynthesis rate, chlorophyll content and initial development of physic nut without micronutrient fertilization. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 37, n. 5, p. 1334-1342, set./out. 2013. Título em Português: Taxa fotossintética, teor de clorofila e desenvolvimento inicial do pinhão-manso cultivado com omissão de micronutrientes.| Biblioteca(s): Embrapa Solos / UEP-Recife. |
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| 7. | | D'ASCENÇÃO, E. V.; CAMPOS, A. G. de; SILVA, B. M.; OLIVEIRA, M. F. de; ARAÚJO, G. S. S.; BATISTA, A. M.; FREITAS, D. A. F. de. Índice S em área de monocultivo de milho sob diferentes métodos de preparo do solo. In: JORNADA CIENTÍFICA E TECNOLÓGICA DO IFSULDEMINAS, 7.; SIMPÓSIO DE PÓS-GRADUAÇÃO, 4., 2015, Poços de Caldas. Anais. Poços de Caldas: IFSuldeminas, 2015.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 9. | | CAMPOS, A. G. de; RAMOS, M. C. P.; CAMPOS, M. P.; OLIVEIRA, M. F. de; SILVA, B. M.; FREITAS, D. A. F. de. Estabilidade da estrutura de um Latossolo Vermelho após vinte anos de cultivo e manejo em diferentes sistemas de preparo do solo. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 35., 2015, Natal. O solo e suas múltiplas funções: anais. Natal: Sociedade Brasileira de Ciência do Solo, 2015.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 10. | | CAMPOS, A. G. de; RAMOS, M. C. P.; PRETO, V. R. de O.; OLIVEIRA, M. F. de; SILVA, B. M.; FREITAS, D. A. F. de. Resistência à penetração como indicadora de alterações estruturais no solo decorrentes de implementos para manejo do solo. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 35., 2015, Natal. O solo e suas múltiplas funções: anais. Natal: Sociedade Brasileira de Ciência do Solo, 2015.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 11. | | ARAÚJO, G. S. S.; CAMPOS, A. G. de; BATISTA, A. M.; COURA, P. A. M. da C.; OLIVEIRA, M. F. de; FREITAS, D. A. F. de; SILVA, B. M. Influência dos diferentes tipos de manejo do solo na qualidade física de um Latossolo Vermelho distrófico. In: JORNADA CIENTÍFICA E TECNOLÓGICA DO IFSULDEMINAS, 7.; SIMPÓSIO DE PÓS-GRADUAÇÃO, 4., 2015, Poços de Caldas. Anais. Poços de Caldas: IFSuldeminas, 2015.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 12. | | COURA, P. A. M. da C.; CAMPOS, A. G. de; BATISTA, A. M.; ARAÚJO, G. S. S.; SILVA, B. M.; OLIVEIRA, M. F. de; FREITAS, D. A. F. de. Efeitos de diferentes tipos de preparo do solo na retenção de água de um Latossolo Vermelho distrófico. In: JORNADA CIENTÍFICA E TECNOLÓGICA DO IFSULDEMINAS, 7.; SIMPÓSIO DE PÓS-GRADUAÇÃO, 4., 2015, Poços de Caldas. Anais. Poços de Caldas: IFSuldeminas, 2015.| Biblioteca(s): Embrapa Milho e Sorgo. |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
03/03/2006 |
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Data da última atualização: |
10/07/2017 |
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Autoria: |
LEITE, R. M. V. B. C.; AMORIM, L.; BERGAMIN FILHO, A. |
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Título: |
Relationships of disease and leaf area variables with yield in the Alternaria helianthi-?sunflower pathosystem. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Plant Pathology, v. 55, n. 1, p. 73-81, Feb. 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
Three field experiments were carried out in 1997/1998, 1998/1999 and 1999/2000 to investigate the relationship between severity (S) of alternaria leaf spot, caused by Alternaria helianthi, area under disease progress curve (AUDPC), healthy leaf area index at any given day (HLAI), healthy leaf area duration (HAD), radiation intercepted by healthy leaf area at any given day (HRI), total healthy leaf area absorption (HAA), and yield components of sunflower sown on four dates. AUDPC showed a relationship with yield in two years, following the negative exponential model coefficient of determination (R2 = 0·79 and 0·60). The HAD?yield relationship was linear for each of three trials (0·73 < R2 < 0·83). Among the integral variables analysed, the HAA?yield relationship was the best, fitted by the exponential model (0·77 < R2 < 0·89). Single-point models using disease severity, HLAI and HRI to estimate yield at various times during the crop season were tested. The slope of the severity?yield relationship was stable from the R1 (inflorescence visible) growth stage. The HLAI?yield relationship was stable between R1 and R6 (anthesis completed) and increased from the R7 (first phase of achene development) stage. The HRI?yield relationship was variable and not stable. The relationship between severity and yield in the R3 (second phase of inflorescence elongation) growth stage proved that plants with disease severity higher than 10% had yield lower than 500 kg ha1, regardless of the sowing date. This value can be used as a damage threshold for the disease. Disease severity can be used as an independent variable in a sunflower?-alternaria leaf spot management system and can be used to produce recommendations at the research level, such as genetic breeding for disease resistance or studies on sowing date. MenosThree field experiments were carried out in 1997/1998, 1998/1999 and 1999/2000 to investigate the relationship between severity (S) of alternaria leaf spot, caused by Alternaria helianthi, area under disease progress curve (AUDPC), healthy leaf area index at any given day (HLAI), healthy leaf area duration (HAD), radiation intercepted by healthy leaf area at any given day (HRI), total healthy leaf area absorption (HAA), and yield components of sunflower sown on four dates. AUDPC showed a relationship with yield in two years, following the negative exponential model coefficient of determination (R2 = 0·79 and 0·60). The HAD?yield relationship was linear for each of three trials (0·73 < R2 < 0·83). Among the integral variables analysed, the HAA?yield relationship was the best, fitted by the exponential model (0·77 < R2 < 0·89). Single-point models using disease severity, HLAI and HRI to estimate yield at various times during the crop season were tested. The slope of the severity?yield relationship was stable from the R1 (inflorescence visible) growth stage. The HLAI?yield relationship was stable between R1 and R6 (anthesis completed) and increased from the R7 (first phase of achene development) stage. The HRI?yield relationship was variable and not stable. The relationship between severity and yield in the R3 (second phase of inflorescence elongation) growth stage proved that plants with disease severity higher than 10% had yield lower than 500 kg ha1, regardless of the sowing... Mostrar Tudo |
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Thesagro: |
Doença de Planta; Fungo; Girassol. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02369naa a2200181 a 4500
001 1468959
005 2017-07-10
008 2006 bl --- 0-- u #d
100 1 $aLEITE, R. M. V. B. C.
245 $aRelationships of disease and leaf area variables with yield in the Alternaria helianthi-?sunflower pathosystem.
260 $c2006
520 $aThree field experiments were carried out in 1997/1998, 1998/1999 and 1999/2000 to investigate the relationship between severity (S) of alternaria leaf spot, caused by Alternaria helianthi, area under disease progress curve (AUDPC), healthy leaf area index at any given day (HLAI), healthy leaf area duration (HAD), radiation intercepted by healthy leaf area at any given day (HRI), total healthy leaf area absorption (HAA), and yield components of sunflower sown on four dates. AUDPC showed a relationship with yield in two years, following the negative exponential model coefficient of determination (R2 = 0·79 and 0·60). The HAD?yield relationship was linear for each of three trials (0·73 < R2 < 0·83). Among the integral variables analysed, the HAA?yield relationship was the best, fitted by the exponential model (0·77 < R2 < 0·89). Single-point models using disease severity, HLAI and HRI to estimate yield at various times during the crop season were tested. The slope of the severity?yield relationship was stable from the R1 (inflorescence visible) growth stage. The HLAI?yield relationship was stable between R1 and R6 (anthesis completed) and increased from the R7 (first phase of achene development) stage. The HRI?yield relationship was variable and not stable. The relationship between severity and yield in the R3 (second phase of inflorescence elongation) growth stage proved that plants with disease severity higher than 10% had yield lower than 500 kg ha1, regardless of the sowing date. This value can be used as a damage threshold for the disease. Disease severity can be used as an independent variable in a sunflower?-alternaria leaf spot management system and can be used to produce recommendations at the research level, such as genetic breeding for disease resistance or studies on sowing date.
650 $aDoença de Planta
650 $aFungo
650 $aGirassol
700 1 $aAMORIM, L.
700 1 $aBERGAMIN FILHO, A.
773 $tPlant Pathology$gv. 55, n. 1, p. 73-81, Feb. 2006.
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