Articles
Plant extracts for management of postharvest fungal rot of Carica papaya L.
Article number
1348_14
Pages
99 – 104
Language
English
Abstract
Carica papaya L. is an important tropical fruit crop cultivated for its food, industrial and medicinal applications.
However, its production is curtailed by postharvest rot.
Due to food safety concerns, application of synthetic fungicides to manage these rots is being de-emphasised, making application of ecofriendly botanicals the next option.
There is paucity of information on the best botanicals for control of fungal rot of papaya in southwest Nigeria, hence aqueous extracts of some plants were evaluated for their antimicrobial activity in vitro and in vivo in the management of postharvest rot of pawpaw.
Infected pawpaw fruits were collected from a farm and fungi were isolated and identified using standard procedures.
Pathogenicity test on healthy pawpaw fruits was done using Kochs postulates.
The effects of aqueous leaf extracts of Morinda lucida, Hyptis suaveolens and Mangifera indica at 5, 7.5, 10, 15 and 20% v/v were evaluated against the identified fungal pathogens in vitro.
The extracts were assigned in a completely randomized design.
The mycelial growth diameter was measured.
Data were analysed by statistical analysis of variance (ANOVA) and means were separated using Duncan multiple range test and LSD at 5% probability.
Isolates of Lasiodiploidia sp., Phomopsis sp., Rhizopus sp. and Macrophomina sp. caused 36.07 and 47.28% fruit damage, respectively. Mangifera indica leaf extract at 20% (v/v) concentration had highest antimicrobial effects on the pathogens in vitro.
It inhibited mycelial growth by over 70%. Consequently, Mangifera indica leaf extract was used for the in vivo phase of the study.
It decreased rot severity to 8.97-13.22% in vivo against the four pathogens. Mangifera indica leaf extract was the most effective against fruit rot pathogens of papaya.
It is a promising alternative to synthetic fungicides.
However, its production is curtailed by postharvest rot.
Due to food safety concerns, application of synthetic fungicides to manage these rots is being de-emphasised, making application of ecofriendly botanicals the next option.
There is paucity of information on the best botanicals for control of fungal rot of papaya in southwest Nigeria, hence aqueous extracts of some plants were evaluated for their antimicrobial activity in vitro and in vivo in the management of postharvest rot of pawpaw.
Infected pawpaw fruits were collected from a farm and fungi were isolated and identified using standard procedures.
Pathogenicity test on healthy pawpaw fruits was done using Kochs postulates.
The effects of aqueous leaf extracts of Morinda lucida, Hyptis suaveolens and Mangifera indica at 5, 7.5, 10, 15 and 20% v/v were evaluated against the identified fungal pathogens in vitro.
The extracts were assigned in a completely randomized design.
The mycelial growth diameter was measured.
Data were analysed by statistical analysis of variance (ANOVA) and means were separated using Duncan multiple range test and LSD at 5% probability.
Isolates of Lasiodiploidia sp., Phomopsis sp., Rhizopus sp. and Macrophomina sp. caused 36.07 and 47.28% fruit damage, respectively. Mangifera indica leaf extract at 20% (v/v) concentration had highest antimicrobial effects on the pathogens in vitro.
It inhibited mycelial growth by over 70%. Consequently, Mangifera indica leaf extract was used for the in vivo phase of the study.
It decreased rot severity to 8.97-13.22% in vivo against the four pathogens. Mangifera indica leaf extract was the most effective against fruit rot pathogens of papaya.
It is a promising alternative to synthetic fungicides.
Publication
Authors
O.E. Odusola, A.O. Aduramigba-Modupe, O.O. Aiyelaagbe, I.O.O. Aiyelaagbe
Keywords
pawpaw, biological control, leaf extracts, Mangifera indica
Groups involved
- Division Plant Genetic Resources, Breeding and Biotechnology
- Division Tropical and Subtropical Fruit and Nuts
- Division Temperate Tree Fruits
- Division Temperate Tree Nuts
- Division Vine and Berry Fruits
- Division Ornamental Plants
- Division Vegetables, Roots and Tubers
- Division Plant-Environment Interactions in Field Systems
- Division Greenhouse and Indoor Production Horticulture
- Division Postharvest and Quality Assurance
- Division Precision Horticulture and Engineering
- Division Horticulture for Human Health
- Division Horticulture for Development
- Division Landscape and Urban Horticulture
- Commission Banana
- Commission Cultivar Registration
- Commission Agroecology and Organic Farming Systems
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