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Revista Brasileira de Fruticultura

Print version ISSN 0100-2945


ABORISADE, Abiola Titilola  and  AJIBADE, Ayodeji Adeyeye. Effect of prestorage curing on storage life, internal and external qualities of sweet orange (Citrus sinensis). Rev. Bras. Frutic. [online]. 2010, vol.32, n.3, pp.910-915. ISSN 0100-2945.

Orange fruits from two seasons, in April and August 2006 representing late 2005 and early 2006 harvests respectively were cured in hot air at 36-370C to 1%, 3%, 5% and 7% weight loss before storage at 280C and 86% relative humidity (RH). The fruits were observed for incidence of decay, further weight loss, juice content, firmness or softening of the peel, total soluble solids (TSS), pH, titratable acidity, and colour during storage. Curing reduced the incidence of decay. All control fruits were rotten by day 21 in August harvest while 22.5% of the control was rotten by day 56 in the April harvest. Storage life was extended beyond 56 days in fruits cured with 1, 3, 5 and 7% in April harvest as there was no decay throughout, while decay incidence in August harvest was 88.9, 61.1, 22.2 and 31.3% in 1, 3, 5 and 7% respectively. Penicillium digitatum, Phytophthora sp., Alternaria citri and Collectotrichum gloeosporioides were among decay causing moulds detected. Control fruits lost more weight during storage than cured fruits did. Fruit rind hardening was more noticed in the control and those cured to 1% weight loss, especially from the April harvest. It was insignificant in other treatments in both trials. Titratable acidity, pH, juice content and TSS were not affected by the treatment. Colour change to yellow was however retarded by curing. Curing to 5% weight loss was best for decay control and quality retention.

Keywords : Curing; weight loss; storage treatment quality; fruits.

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