Rust Diseases
Mostrando 37-48 de 67 artigos, teses e dissertações.
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37. Characterization and selection of soybean experimental lines for rust resistance or tolerance / Caracterização e seleção de linhagens de soja resistentes ou tolerantes à ferrugem asiática
This research aimed to characterize and select soybean genotypes, considering their reaction to Asian soybean rust (FAS) and grain yield (PG). This work was developed in the Sector of Applied Genetics to Self-Pollinated Crops, Department of Genetics, Faculty of Agriculture Luiz de Queiroz, University of São Paulo located in Piracicaba city, State of São Pa
Publicado em: 2009
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38. Asian Rust control and performance of two soybean cultivars submitted to different fungicides and application time / Controle de ferrugem asiática e desempenho de duas cultivares de soja submetidas a diferentes fungicidas e épocas de aplicações
Phakopsora pachyrhizi Syd. &Syd. is the worst threat for soybean crop in the main producers regions around the world, where significant loses has been observed. Many variables in the quantification of damage of this disease have to be studied, such as area under the disease progress curve (AUDPC), healthy leaf area absorption (HAA), healthy leaf area duratio
Publicado em: 2009
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39. Potencial de Ãleos essenciais no manejo da ferrugem e da cercosporiose do cafeeiro / Potential of the essential oils in the control of leaf rust and brown spot eye of coffee plant
The rust and brown spot eye are considered the main diseases of coffee plant, it reduces the production and undermine the drink quality. The management of the disease is conventionally done by application of copper and systemic fungicides, however, they may promote the contamination of man, environment and select resistant pathogens races. Thus, the essentia
Publicado em: 2008
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40. PROGRESSO DA FERRUGEM E DA CERCOSPORIOSE NA CULTURA DO CAFEEIRO IRRIGADO EM VÃRIAS DENSIDADES DE PLANTIO / Progress of rust and cercosporosis in irrigated cultivation of coffee in various densities of planting
The current coffee has been adopted new technologies to conduct and to manage crop, such as irrigation, fertigation and high plant densities in order to increase productivity and consequently, the profit. The aim of this study was to evaluate the effect of different irrigation methods applied in four plant densities by a drip system, its relation with the in
Publicado em: 2008
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41. Genetic potential of population Ouro Negro x BRS Valente bean families / Potencial genético de famílias de feijoeiro da população Ouro Negro x BRS Valente
This work shows the analysis of 192 segregating families derived from the crossing of Ouro Negro and BRS Valente cultivars. The purpose is to develop black beans lines that are resistant to antracnose (Colletotrichum lindemuthianum) and rust (Uromyces appendiculatus), and also to have desirable agronomic traits such as high productivity of grain, erect archi
Publicado em: 2008
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42. Contribuição do tratamento de sementes de soja (Glycine max L. Merril) com fungicidas no manejo da ferrugem asiática / Contribution of soybean (Glycine max L. Merril) seed treatment with fungicides in the management of asian rust
Seed treatment has as traditional objective to eradicate or to reduce fungi associated with seeds and to protect them from soilborne pathogens. Some diseases that occur in the aerial part of plants may be managed through seed treatment with systemic products. This kind of control has been used for many years, aiming the control of biotrophic fungi in rice an
Publicado em: 2008
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43. RIBEIRO JÃNIOR, Pedro Martins. Phosphites for the protection and induction of resistance in coffee plants against Hemileia vastatrix and Cercospora coffeicola. 2008. 105p. Thesis (Doctorate in Phytopathology) â Federal University of Lavras, Lavras. / âFosfitos na proteÃÃo e na induÃÃo de resistÃncia do cafeeiro contra Hemileia vastatrix e Cercospora coffeicolaâ
The present work was aimed at evaluating the effect of the application of potassium, manganese and zinc phosphites on the control of rust and brown eye spot of coffee plants in the field; to verify the protective effect of these products and of acibenzolar-S-methyl (ASM) against brown eye spot on coffee seedlings and to study the mechanisms involved in the d
Publicado em: 2008
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44. Genetic control of soybean (Glycine max) yield in the absence and presence of the Asian rust fungus (Phakopsora pachyrhizi)
Soybean is one of the most important crops in Brazil and continuously generates demands for production technologies, such as cultivars resistant to diseases. In recent years, the Asian rust fungus (Phakopsora pachyrhizi Syd. & P. Syd 1914) has caused severe yield losses and the development of resistant cultivars is the best means of control. Understanding th
Genetics and Molecular Biology. Publicado em: 2008
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45. Impact of downy mildew on soybean yield in South of Mato Grosso do Sul, 2006/2007 crop season / IMPACTO DO MÍLDIO NA PRODUTIVIDADE DA SOJA NO SUL DE MATO GROSSO DO SUL, SAFRA 2006/2007
Foliar diseases that attacks soybean crop constitutes one of the main limiting crop yields for soybeans. Soybean downy mildew, caused by the oomycota Peronospora manshurica, is one of the diseases of major distribution in all regions of the world where soybean is cultivated. Soybean downy mildew can damage leaves and in some cases pods. This research aimed t
Publicado em: 2008
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46. Quantificação de danos e relações entre severidade da doença, medidas de refletância e produtividade no patossistema ferrugem asiática da soja
Os objetivos deste trabalho foram gerar as funções de dano para o patossistema ferrugem Asiática da soja e, verificar o potencial de uso de medidas de refletância para quantificar danos em diferentes épocas de semeadura. Os experimentos foram conduzidos no município de Londrina, PR, nas safras 2003/2004, 2005/2006 e 2006/2007. Ensaios foram repetidos e
Publicado em: 2008
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47. Process of knowledge discovery in databases for analysis and warning of crop diseases and its application on coffee rust / Processo de descoberta de conhecimento em bases de dados para a analise e o alerta de doenças de culturas agricolas e sua aplicação na ferrugem do cafeeiro
Sistemas de alerta de doenças de plantas permitem racionalizar o uso de agrotóxicos, mas são pouco utilizados na prática. Complexidade dos modelos, dificuldade de obtenção dos dados necessários e custos para o agricultor estão entre as razões que inibem o seu uso. Entretanto, o desenvolvimento tecnológico recente - estações meteoro lógicas autom
Publicado em: 2008
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48. Estratégias para seleção de linhagens experimentais de soja para tolerância à ferrugem e associações com outras doenças / Strategies for selection of soybean lines to rust tolerance and associations with other diseases
Soybean rust (Phakopsora pachyrhizi Sydow and Sydow) was first recorded in Brazil during the 2000/01 season and, even today, represents an important challenge to soybean breeding. The cultivars and lines initially identified as resistant had their resistance breakdown on the 2002/03 season, probably by the occurrence of new races of the pathogen. Consequentl
Publicado em: 2007