Efeito da Incidência da mancha angular do feijão na transmissão de Pseudocercospora griseola (Sacc) Crous & U. Braun e na qualidade da semente.

• Ano de defesa: 2008
• Autor(a) principal: Marques, Marília Wortmann
• Orientador(a): Rossetto, Edemar Antonio
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Pelotas
• Programa de Pós-Graduação: Programa de Pós-Graduação em Fitossanidade
• Departamento: Faculdade de Agronomia Eliseu Maciel
• País: BR
• Palavras-chave em Português: Patógeno; Severidade; Qualidade fisiológica; Mancha angular do feijão; Pseudocercospora griseola
• Palavras-chave em Inglês: Pathogen; Severity; Physiological quality
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE
• Link de acesso: http://repositorio.ufpel.edu.br/handle/ri/2100

The present work purposes to study the fungus Pseudocercospora griseola (Sacc) Crous & U. Braun, causal agent of angular leaf spot on common bean, to evaluate the incidence and severity in produced beans plants from seeds proceeding from pod with different levels of disease, as well as, to verify the effect in the physiological and sanitary quality of the produced seeds. For the development of the experiment, beans plants have been collected with high incidence of angular leaf spot, natural infestation the field. From the collected material it was elaborated a diagrammatic scales varying of 1 the 5, corresponding each note to a severity level on the physical structure of the pod. Parallel experiment was carried out, evaluating symptoms of angular spot in different places of the seed: hilum and coat. The tests carried through in the deriving seeds of the respective treatments had been: tests of germination (TPG), accelerated aging (EA), test of humidity and health. The results had shown that the incidence and the severity of angular leaf spot on common bean had been differed statistical between itself, where the levels of scale 1 and 5 had presented with minor and greater degree of incidence and severity of P. griseola, respectively. Whereas the seeds with symptoms in hilum and in the coat have presented resultes similar to the incidence and severity of the causal agent. The correlation enters the severity of pod and the severity of the disease in the plants was significant. There wasn´t statistical differences between the test of accelerated aging in the tested treatments, resulting a variation of 82-88% of normal seedlings. In the test of germination, treatment 5 differing statistical from the others treatments. In the sanitary analysis the fungus of storage increase incidence to the measure that increased the level of severity of the treatments. It was concluded in this work that pod with 60 % of symptoms of angular leaf spot have the capacity to intervene in the germination of the beans seeds and and that bigger levels of severity of the string beans cause a bigger development of the disease in field.