SLIIT Conference and Symposium Proceedings

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All SLIIT faculties annually conduct international conferences and symposiums. Publications from these events are included in this collection.

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Has files: YesSubject: search.filters.subject.Postharvest quality

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    PublicationOpen Access
    Effect of 1-Methylcyclopropene and Wrapping Material on Shelf-Life and Postharvest Qualities of Spine Gourd (Momordica dioica)
    (Faculty of Humanities and Sciences - SLIIT, 2021-03-26) Wijesinghe, G.P.M; Kumara, G.D.K; Kumara, J.B.D.A.P
    Spine gourd (Momordica dioica) is a tropical underutilized, climbing creeper vegetable (commonly known as kakrol, spiny gourd or teasle gourd) belonging to the family cucurbitaceae. It is native to Asia and now extensively distributed in Sri Lanka due to boosted commercial cultivation of hybrid varieties. Spine gourd has a growing demand both in the local and the export market for its distinct taste and promising health properties over thousands of years. However, vulnerability to postharvest damages due to large area/volume ratio and climacteric ripening behaviour result in short shelf- life for this commodity. Consequently, its market potential is significantly affected. The present study attempts to extend shelf-life while maintaining postharvest qualities in spine gourd by using 1- methylcyclopropene (1-MCP) and Low-Density Polyethylene (LDPE) wrapping at an ambient temperature (27±1 ⁰ᢽ). The experiment was conducted according to the Completely Randomized Design (CRD) using eight treatments: 0, 0.5, 1.0, 1.5 µL L-1 1-MCP treated for 15 hours and stored with and without LDPE wrapping under ambient temperature (27±1 oᢽ). Physical parameters; fresh weight loss, firmness, peel colour changes, and chemical parameters; total soluble solids, titratable acidity, were evaluated daily. Fresh weight loss and peel colour changes significantly declined in wrapped Spine gourd fruits. The highest firmness was observed in chemically treated and LDPE wrapped fruits than the control during 5 days of the storage. Thus, it can be concluded that some postharvest qualities of Spine gourd are positively affected by 1-MCP treatment and LDPE wrapping.
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    PublicationEmbargo
    The effect of different ethylene concentrations on different maturity stages on the postharvest quality of Cavendish banana (Musa acuminate) cultivar, ‘Grande Naine’
    (Faculty of Humanities and Sciences,SLIIT, 2021-09-25) Subasinghe, S. M. J. C; Kodithuwakkuge, V. N; Attanayake, U; Wasala, W. M. C. B; Dammullage, I; Beneragama, C. K
    Banana is one of the most cultivated fruit crops in Sri Lanka and 5% of total production is exported. Due to a lack of knowledge on harvesting maturity, artificial ripening and other postharvest technologies, 20% of the yield is lost during the post-harvest handling of banana. This study was conducted to examine the effect of application of different ethylene concentrations at different maturity stages on postharvest quality of Cavendish banana (Musa acuminate) cultivar ‘Grande Naine’ under tropical climate conditions. Mature bananas combs (hands) at twelve weeks, thirteen weeks and fourteen weeks after flowering were exposed to 0, 85 and 170 ppb of ethylene gas for 24 hours at 24 ˚C and under 75% RH. Different physicochemical properties were obtained and analyzed statistically. There was a significant interaction effect between the maturity stage and ethylene concentration on weight loss, TSS and pH at the table-ripe stage. The fruits lost weight steadily down to 8.5%, possibly because of the rapid rates of metabolism as well as water loss. Meanwhile, TSS increased from 4% to 20% and pH decreased gradually with the ripening of banana. The results revealed that the best stage of maturity for harvesting Cavendish bananas is at 11-12 weeks after flowering for improved physicochemical and sensory properties at the table ripe stage. Further, it can be concluded that the use of ethylene concentration of 85 ppb for ripening Cavendish banana instead of the higher concentrations that are commercially applied, would be cost-effective without decreasing the fruit quality.