Resumo

APAZA, Rinel et al. Effect of saponins of Chenopodium quinoa Willd agains the phytopatogenic fungus Cercospora beticola Sacc.. Rev. Protección Veg. [online]. 2016, vol.31, n.1, pp. 63-69. ISSN 2224-4697.

In this paper, the evaluation of the antifungal activity of an extract rich in quinoa saponins (Chenopodium quinoa Willd) is presented. The extract was obtained from waste of the industrial process to benefit the quinoa grains and controlled chemically by HPLC. The activity was evaluated against the fungus Cercospora beticola Sacc. which affects the chard crop. Extract concentrations of 250 mg/ml, 50 mg/ml, 5 mg/ml, 0.5 mg/ml and 0.05 mg/ml were tested using two methods: poisoning of the culture medium and evaluation (in situ) of the control of C. beticola on chard leaves. From a concentration of 5 mg/ml, the extract showed good activity in both cases. Thus, the use of quinoa saponins is promising to control this phytopathogenic fungus in the chard crop, and other crops where the incidence of this fungus is observed.

Palavras-chave : saponins; Cercospora beticola; antifungal activity; Chenopodium quinoa.

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