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

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Charles Oluwaseun Adetunji Israel Sunmola Afolabi Juliana Bunmi Adetunji

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.

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How to Cite
ADETUNJI, Charles Oluwaseun; AFOLABI, Israel Sunmola; ADETUNJI, Juliana Bunmi. 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, [S.l.], v. 53, n. 4, p. 364–372, aug. 2019. ISSN 2452-316X. Available at: <http://kuojs.lib.ku.ac.th/index.php/anres/article/view/2954>. Date accessed: 22 nov. 2019.
Section
Research article