Suppression of Stem-End Rot on Avocado Fruit Using Trichoderma spp. in the Central Highlands of Kenya

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dc.contributor.authorWanjiku, E. K.
dc.contributor.authorWaceke, J. W.
dc.contributor.authorMbaka, J. N.
dc.date.accessioned2022-02-23T09:09:29Z
dc.date.available2022-02-23T09:09:29Z
dc.date.issued2021-03-05
dc.descriptionA R search Article in the Advances in Agricultureen_US
dc.description.abstractDemand for organic avocado fruits, together with stringent food safety standards in the global market, has made producers to use alternative, safe, and consumer-friendly strategies of controlling the postharvest fungal disease of avocado fruits. +is study assessed the in vitro efficacy of Trichoderma spp. (T. atroviride, T. virens, T. asperellum, and T. harzianum) against isolated avocado stem-end rot (SER) fungal pathogens (Lasiodiplodia theobromae, Neofusicoccum parvum, Nectria pseudotrichia, and Fusarium solani) using a dual culture technique. +e Trichoderma spp. were also evaluated singly on postharvest “Hass” avocado fruits. Spore suspension at 5 ×104 conidial/ml of the Trichoderma spp. was applied on the avocado fruits at three time points, twenty-four hours before the fungal pathogen (preinoculation), at the same time as the fungal pathogen (concurrent inoculation), and 24 hours after the fungal pathogen (postinoculation). In the in vitro study, T. atroviride showed the highest mycelial growth inhibition against N. parvum (48%), N. pseudotrichia (55%), and F. solani (32.95%), while T. harzianum had the highest mycelial growth inhibition against L. theobromae. Trichoderma asperellum was the least effective in inhibiting the mycelial growth of all the pathogens. Similarly, T. virens showed the highest mycelial growth inhibition against N. pseudotrichia at 45% inhibition. On postharvest “Hass” fruits, T. atroviride showed the highest efficacy against N. parvum, N. pseudotrichia, and F. solani in all the applications. Trichoderma virens and T. harzianum were most effective against all the pathogens during postinoculation, while Lasiodiplodia theobromae was best controlled by T. virens, T. harzianum, and T. asperellum during postinoculation. Both T. atroviride and T. harzianum present a potential alternative to synthetic fungicides against postharvest diseases of avocado fruits, and further tests under field conditions to be done to validate their efficacy. +e possibility of using Trichoderma spp. in the management of SER on avocado fruits at a commercial level should also be explored.en_US
dc.identifier.citationWanjiku, E. K., Waceke, J. W., & Mbaka, J. N. (2021). Suppression of Stem-End Rot on Avocado Fruit Using Trichoderma spp. in the Central Highlands of Kenya. Advances in Agriculture, 2021.en_US
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/23175
dc.language.isoenen_US
dc.publisherHindawien_US
dc.subjectSuppressionen_US
dc.subjectStem-End Roten_US
dc.subjectAvocado Fruiten_US
dc.subjectUsing Trichoderma spp.en_US
dc.subjectCentral Highlandsen_US
dc.subjectKenyaen_US
dc.titleSuppression of Stem-End Rot on Avocado Fruit Using Trichoderma spp. in the Central Highlands of Kenyaen_US
dc.typeArticleen_US
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