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Antifungal Activity of Onion (Allium cepa L.) Bulb Extracts Against Fusarium oxysporum and Colletotrichum sp.

Authors:
Djanna Fadul Cornago at University of the Philippines
Djanna Fadul Cornago
Evangeline C Amor at University of the Philippines
Evangeline C Amor
Windell L Rivera at University of the Philippines
Windell L Rivera
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Abstract

Antifungal activities of methanol (FA), ethyl acetate (FC) and aqueous (FD) extracts of onion (Allium cepa L.) bulb against Fusarium oxysporum and Colletotrichum sp. were determined. FC showed significant activity against both fungi even at 2,000 mu g mL(-1). The activity of FC was not significantly different (p>0.05) compared with that of captan, a known fungicide against F. oxysporum and Colletotrichum spp. FC was fractionated using normal phase vacuum liquid chromatography, resulting in ten fractions. Six out of the ten fractions showed activity against both fungi. FC6 had a minimum inhibitory. concentration (MIC) of 200 ppm. These results showed that onion bulb can be a source of compounds that can serve as templates for future fungicides against Fusarium oxysporum and Colletotrichum spp.
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Full-text available
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