Antimicrobial properties of Moringa oleifera extracts on blueberry postharvest fungal diseases

A. Nkanzela, S.Z. Tesfay, N.C. Mbili, A. Mditshwa, L.S. Magwaza
Blueberry popularity has increased over the years due to its nutritional properties and potential of reducing cancer, heart and liver problems. However, challenges such as short storage life due to postharvest diseases (Botrytis cinerea) have negative effects on quality and shelf-life of blueberries. This study investigated the effectiveness of ethanol, hexane, chloroform and acetyl acetate extracts of Moringa oleifera as postharvest treatments for Botrytis cinerea and Colletotrichum gloeosporioides. In vitro and in vivo direct contact essays were performed to test the antifungal properties of moringa extracts at 25°C. A fixed concentration of 10% was used for all the extracts. All treatments showed fungicidal (100%) effects against both fungal pathogens under in vitro study except for acetyl acetate extracts which showed a 90.2% growth inhibition of grey mould mycelia. For the in vivo direct contact essays, the hexane extract of moringa completely inhibited Botrytis incidence and disease incidence of only 1% was observed under ethanol extracts for Colletotrichum gloeosporioides. These findings indicate that Moringa oleifera extracts have potential in controlling Botrytis cinerea and Colletotrichum gloeosporioides, the major postharvest diseases that result in poor quality and reduced shelf-life of blueberries.
Nkanzela, A., Tesfay, S.Z., Mbili, N.C., Mditshwa, A. and Magwaza, L.S. (2021). Antimicrobial properties of Moringa oleifera extracts on blueberry postharvest fungal diseases. Acta Hortic. 1306, 329-334
DOI: 10.17660/ActaHortic.2021.1306.42
moringa leaf extract, Botrytis cinerea, Colletotrichum gloeosporioides, mycelial growth, disease incidence, in vitro, in vivo

Acta Horticulturae