Antifungal activity of propyl disulphide from neem against Lasiodiplodia theobromae and Neofusicoccum parvum causing stem end rot in mango

Aim To investigate the antifungal effect of the neem extract volatile propyl disulphide against the fungal plant pathogens. Methods and Results Postharvest pathogens were isolated and identified as Lasiodiplodia theobromae and Neofusicoccum parvum causing the stem end rot of mango fruit. Antifungal...

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Bibliographic Details
Published in:Journal of applied microbiology 2020-11, Vol.129 (5), p.1364-1373
Main Authors: Rafiullah Khan, M., Suwanamornlert, P., Sangchote, S., Chonhenchob, V.
Format: Article
Language:English
Subjects:
Antifungal activity
Antifungal agents
antimicrobial
Antimicrobial agents
Distilled water
Disulfides
Ethanol
Food industry
Fruit rot
Fruits
Fungi
Fungicides
Growth curves
Growth models
Lag phase
Lasiodiplodia theobromae
Mangifera indica
mango
Mangoes
Microorganisms
Mycelia
Neem
neem extract
Neofusicoccum parvum
Pathogens
Plant extracts
Post-harvest decay
postharvest decay
postharvest rots
propyl disulphide
Stationary phase
stem end rot
Stems
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Summary:Aim To investigate the antifungal effect of the neem extract volatile propyl disulphide against the fungal plant pathogens. Methods and Results Postharvest pathogens were isolated and identified as Lasiodiplodia theobromae and Neofusicoccum parvum causing the stem end rot of mango fruit. Antifungal activity of propyl disulphide at different concentrations was determined in comparison with ethanol and distilled water. Both diffusion assays were effective in controlling the mycelial growth of the tested fungi. The high coefficient of determination (R2, 0·970–0·997) of the growth curves indicated the good fit of the experimental data to the Gompertz growth model. Propyl disulphide significantly (P ≤ 0·05) decreased the mycelial growth during the stationary phase (A) and increased the lag phase (λ) than both control (ethanol and distilled water). Conclusion This compound can potentially be applied to other tropical and subtropical fruits for the successful control of postharvest losses of fresh produce. Significance and Impact of the Study This is the first report of propyl disulphide from neem extract against plant pathogens and could be beneficial for effective microbial decay prevention in food industries.
ISSN:1364-5072
1365-2672
DOI:10.1111/jam.14725