Navegando por Autor "Gomes, Clóvis José Alcides"

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    Macrophomina phaseolina em soja - padrão de ocorrência, danos e aspectos físico-químicos e biológico do solo relacionados à doença
    (Universidade Estadual do Norte do Paraná, 2014-08-26) Gomes, Clóvis José Alcides; Torres, João Pereira; https://orcid.org/0000-0002-7306-9872; http://lattes.cnpq.br/2582950118304206; Torres, João Pereira; https://orcid.org/0000-0002-7306-9872; http://lattes.cnpq.br/2582950118304206; Bueno, João Tavares; https://orcid.org/0000-0003-0716-1141; http://lattes.cnpq.br/2889380559858950; Sauer, Aline Vanessa; https://orcid.org/0000-0003-3164-9710; http://lattes.cnpq.br/3853729166385893; Gandolfo, Marco Antônio; https://orcid.org/0000-0003-2314-3752; http://lattes.cnpq.br/5560552732033631; Conte, Ana Maria; http://lattes.cnpq.br/1406959857364094
    The charcoal rot of soybean caused by Macrophomina phaseolina, has grown in importance with each harvest. The disease is liable for damages up to 50% in late cultivars. To investigate the intensity of the disease and damage imposed on the culture, we compared the situations reboleiras (spots of the disease on the crops) with the healthy areas in the search for a biological factor (inoculum concentration) and / or physical-chemical he was acting at the level of reboleiras, raising stress on the plant, thus leading to infection. 25 crops were inspected at random on North Paraná. In all of the disease was observed, with an average of 35.21% of the affected area with plants in crops. The total mass of grains and thousand grain weight were compared between plants collected from healthy plants and the reboleiras areas. The loss was approximately 3.61% of the final production due to illness. We evaluated the chemical composition and physical soil properties within and outside reboleiras. The chemical composition (pH, OM, Ca, P, K, Al) and physical (micro and macroporosity) attributes did not differ by Student's test at 5% probability. However soil density was statistically different in the two environments with 1.23 (Mg m-3) and 1.37 in reboleiras out of them. In areas reboleiras the inoculum potential was 65.5 microsclerotia per gram of soil and 62.5 in the healthy areas, not differing among themselves (p <0.05).