Rust Plant Disease
Mostrando 25-36 de 47 artigos, teses e dissertações.
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25. Aspectos bioquímicos em plantas de cafeeiro tratadas com silício / Biochemical features in coffee plants treated with silicon
Most plants can defend themselves against fungal infections by natural means, which can be induced by a number of biotic and abiotic elicitors. Soluble silicon (Si) has been shown to induce resistance in a number of plant species against several pathogens. The objective of this work was to assess the influence of silicon application of symptoms caused by the
Publicado em: 2008
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26. 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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27. 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
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28. Analysis of gene expression induced for Phakopsora pachyrhizi in soybean / Análise da expressão gênica induzida por Phakopsora pachyrhizi em soja
Soybean Asian Rust, a disease caused by the fungi Phakopsora pachyrhizi, has caused serious economic damages to the Brazilian and world-wide soybean crop. The development of soybean lines resistant to this fungi has been a challenge, and currently the measures of control this disease are based on the handling of the crop and application of fungicides. With t
Publicado em: 2007
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29. Caracterização epidemiológica da resistência parcial e análise da tolerância de genótipos de soja à ferrugem asiática / Epidemiological characterization of partial resistance and evaluation of tolerance to Soybean Asian Rust on soybean genotypes
O objetivo deste trabalho foi avaliar a resistência parcial e a tolerância à ferrugem asiática, em sete cultivares comerciais e três linhagens de soja. Os ensaios foram conduzidos no município de Jataí, GO, no ano agrícola de 2005/2006. Ensaios distintos foram realizados para avaliação da resistência parcial e para avaliação da tolerância, todo
Publicado em: 2007
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30. Epidemiology and management of coffee (Coffea arabica L.) diseases under organic farming. / Epidemiologia e manejo de doenÃas do cafeeiro (Coffea arabica L.) sob cultivo orgÃnico
The present work aimed to study coffee diseases on organic crop system. For that, rust and black eye spot disease progress on organic and conventional crop systems were compared. The effect of nutrient sources in the disease management was evaluated and, finally, the effect of plant extracts in the protection of coffees in the organic system was tested. The
Publicado em: 2006
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31. Pathogenic variability of Puccinia melanocephala and Ustilago scitaminea in the State of São Paulo / Variabilidade patogênica de Puccinia melanocephala e Ustilago scitaminea no estado de São Paulo
Rust and smut are among the most important diseases of sugarcane, being considered in every breeding program both in parent selection as well as in evaluating progeny behavior. When the crop is distributed to large extensions, it becomes very important to know the amplitude of the pathogenic variation in the population of the causal agent. Considering the im
Publicado em: 2006
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32. Seleção de rizobactérias como promotoras de crescimento e indutoras de resistência sistêmica em feijoeiro / Selection of rhizobacteria as growth-promoters and inducers of systemic resistance in bean
Two hundred rhizobacteria obtained from rhizosphere and rhizoplane of healthy looking bean plants were investigated for their ability to promote growth in bean plants, increase grain yield and induce systemic resistance against leaf pathogens. In growth-promoting assays, bean seeds (Ouro Negro) were microbiolized with a propagule suspension and next sown und
Publicado em: 2006
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33. Epidemiology of soybean rust in different places on Goiás State: fungicide and time of planting effect / Epidemiologia da ferrugem asiática da soja em ambientes do Estado de Goiás: efeito de fungicida e época de semeadura
During the last crops, the soybean rust has been appeared as one of the most important problems in the national agriculture. The direct loses on the production and in the costs with fungicides have been increased the damages on this crop. Aiming to understand better the disease epidemiology, this work searched for answers by epidemic progress in two location
Publicado em: 2005
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34. Desenvolvimento do pessegueiro em função da intensidade de poda verde / Development of the peach tree related to green pruning intensity
O Estado de São Paulo caracteriza-se como o principal produtor de pêssegos (Prunus persica (L.) Batsch) para consumo in natura do Brasil. Devido ao cultivo ser realizado em diferentes regiões e pelo uso de cultivares precoces e bem precoces, a maioria da safra ocorre na estação da primavera, antecipadamente à região Sul do Brasil. Um dos problemas
Publicado em: 2005
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35. Purificação da enzima polifenoloxidase do cafeeiro, sua relação com resistencia a pragas e o controle da sintese de seu principal substrato, o acido clorogenico / Coffee polyphenoloxidase purification, its relation with plague resistance and synthesis control of its maim substrate, chlorogenic acid
Polyphenoloxidase - PPO (EC 1.14.18.1 ou EC 1.10.3.2) is an enzyme with broad distribution among plants and catalyzes the hydroxylation of monophenols to o-diphenols and the oxidation of these to o-diquinones. Its function on plants has been related to defense mechanisms against pathogens and plagues. 5-Caffeoylquinic acid, also known as chlorogenic acid (CG
Publicado em: 2005
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36. Cruzabilidade entre espécies silvestres de Arachis visando à introgressão de genes de resistência a doenças no amendoim cultivado. / Crossability among wild species of Arachis for introgression of disease resistance genes into cultivated groundnut.
Groundnut (Arachis hypogaea) is one of the most important oil species in the world. In 2002, Brazil produced about 190 thousand tonelades, with 80 per cent of cultivated area concentrated in the State of São Paulo. The main problem in crop management in this State and in many other growing areas in the world is represented by fungal diseases. Several specie
Publicado em: 2004