Avaliação do hipoclorito de sódio na severidade da ferrugem asiática, do oídio e nas características químicas da soja

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Soybean [Glycine max (L) Merril] is a crop with great world economic expression due to its nutritional content and multiple usages. Its constant cultivation has lead to the development of many diseases affecting yield and quality. Powdery mildew (Erysiphe diffusa (Cooke &Peck)) and asian soybean rust (Phakopsora pachyrhizi (Syd. &P. Syd)) are among the most important diseases of this particular crop. This research was carried out aiming to evaluate the potential use of sodium hypochlorite as a reducing factor of these diseases in the crop. Concentrations of sodium hypochlorite of 0,2%, 0,4% and 0,6%, as a fungicide, and a possible decrease in nutrients uptake by the crop were evaluated. The concentration of 0,6% was efficient in the control of powdery mildew in the winter season of 2008 and the other doses, with no fungicide, were also efficient on 2008/2009 crop season. Considering asian rust, the concentrations used were inefficient for disease control. The treatment with 0,2% + fungicide reduced absorption of cupper in 2008/2009 season. The treatment of 0,6% + fungicide increased silicon uptake in 2008 winter season. More studies are necessary aiming to evaluate different concentrations of sodium hypochlorite, increasing the action spectrum of the product and its effects on other pests and also the nutritional content of the final product. This should be done to call farmers attention to control alternative methods and reduce pesticides use in this particular crop.

ASSUNTO(S)

minerals uptake absorção de minerais quimica alternative disease control hipoclorito de sódio glycine max glycine max sodium hypochlorite controle alternativo de fitopatógenos

ACESSO AO ARTIGO

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