Data/hora: 04/06/2024 14:02:52

Biblioteca(s): | Embrapa Soja.
Data corrente: | 06/04/2004
Data da última atualização: | 27/07/2007
Autoria: | GUERZONI, R. A.; NUNES JUNIOR, J.; SOUSA, R. P.; MONTEIRO, P. M. F. O.; SILVA, L. H. C. P.; ASSUNÇÃO, M. S.; SEII, A. H.; NUNES SOBRINHO, J. B.; SILVA, L. O.; TOLEDO, R. M. C. P.; SOUZA, P. I. M.; MOREIRA, C. T.; ABUD, S.; RODRIGUES, G. C.; SILVA, C. T.; RAMOS, L. F.; VIANA, W. Q.
Título: | Effects of soybean rust (Phakopsora pachyrhizi) on health leaf area duration, and its relationships with yield of soybean.
Ano de publicação: | 2004
Fonte/Imprenta: | In: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004.
Páginas: | p. 84.
Série: | (Embrapa Soja. Documentos, 228).
Idioma: | Inglês
Notas: | Editado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi.
Conteúdo: | Soybean rust caused by Phakopsora pachyrhizi is one of the most important diseases in Brazil and is a threat to soybean cultivation by causing substantial yield losses. Epidemiological studies in many parts of the world have shown a narrow relationship among health leaf area duration (HAD) and yield. To a better understanding of the damage caused by soybean rust, a field research was carried out in a soybean winter crop to evaluate some epidemiological aspects of this disease. Health leaf area duration (HAD) showed significant effects on the number of seeds per plant, on the 1000 seed weight, and on yield. However, it was not showed significant effect on the number of pods per plant, and in the number of not filled pods per plant. The area under disease progress curve (AUDPC) showed significant effect only on 1000 seed weight and on yield, although with less precision than HAD. The fungicides from triazol group and the mixture of triazol with strobilurin showed the best control of soybean rust. It was concluded that the reductions in soybean yield by soybean rust is caused by a reduction on HAD, which reduces the number of seeds per plant and the 1000 seed weight.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (23694-1) - UMT - PL - -- - RF 633.34072 - W927a -  - DIS