Effect of rhamnolipid-Aloe vera gel edible coating on post-harvest control of rot and quality parameters of ‘Agege Sweet’ orange

Adetunji, Charles Oluwaseun and Afolabi, Israel Sunmola and Adetunj, Juliana Bunmi (2019) Effect of rhamnolipid-Aloe vera gel edible coating on post-harvest control of rot and quality parameters of ‘Agege Sweet’ orange. AGRICULTURE AND NATURAL RESOURCES, 53. pp. 364-372.

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Abstract

A local cultivar of sweet orange namely ‘Agege sweet’ constitutes a larger percentage among many citrus varieties planted in Nigeria, but there is a major setback in terms of extending its post-harvest shelf life. This work was designed to assess the effectiveness of a rhamnolipid coating to preserve the quality attributes of Agege sweet orange fruit during 8 wk ambient storage compared with that of Aloe vera gel. Petri plates were supplied with different treatments (volume per volume, v/v) of Aloe vera gel (0%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%) or rhamnolipid (0%, 0.25%, 0.5%, 1.0%, 1.5 %, 2.0%) and oranges were inoculated with a spore suspension of P. digitatum NSP01 spores. The solutions of rhamnolipid (2%) and Aloe vera gel (2%) were evaluated for their biocontrol activity on P. digitatum NSP01. The fruits were stored for 8 wk at 25ºC. The lesion area, firmness, and chemical composition were assessed. The oranges coated with Aloe vera gel and rhamnolipid significantly (p < 0.05) prevented loss in firmness, total soluble solids and titratable acidity and reduced the decay caused by P. digitatum NSP01. Therefore, the newly formulated rhamnolipid-Aloe vera edible coating could serve as a permanent substitute for chemical fungicides used in the management of diseases and pests affecting agricultural productivity.

Item Type:	Article
Uncontrolled Keywords:	Aloe vera gel, Citrus sinensis, Edible coating, Post-harvest management, Rhamnolipid
Subjects:	Q Science > QH Natural history
Divisions:	Faculty of Medicine, Health and Life Sciences > School of Biological Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	09 Aug 2021 12:15
Last Modified:	09 Aug 2021 12:15
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/15276

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