Evaluation of sweet orange varieties for storage characters
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Date
2018
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Punjab Agricultural University, Ludhiana
Abstract
The present investigation entitled “Evaluation of sweet orange varieties for storage characters” was carried out at Department of Fruit science, Punjab Agricultural University, Ludhiana during the year 2017-18. The fresh fruits of sweet orange varieties; Campbell Valencia, Kodur Sathgudi, M-3, M-4, M-8, Olinda Valencia, Phule Mosambi, Trovita, Valencia late, Vernia and Westin were thoroughly washed and graded into two equal lots A and B. Lot A was kept as a control (without the application of any treatment), whereas fruits in lot B were treated with Citrashine wax coating and potassium sorbate along with Citrashine wax (60 g Potassium sorbate in 1000ml wax). The treated fruits were stored under ambient conditions (Temp. 13-25 ˚C) for 7, 14, 21 and 28 days in Corrugated Fibre Board boxes of standard size i.e. 45 x 23 x 18 cm. The observations on various physical and chemical parameters were recorded at different storage intervals. PLW of fruits increased with storage; however, fruits treated with potassium sorbate along with Citrashine wax recorded significantly lower PLW. Similarly, TSS, rag percentage, reducing sugars, total sugars showed increasing trend with increase in storage period. Declining trend was observed in organoleptic rating, peel percentage, acidity, TSS:acid ratio, vitamin C, non-reducing sugars and flavonoid content of fruits. Fruit colour and seed characters were not affected by treatments as well as storage. During ambient storage, potassium sorbate along with Citrashine wax was found to be most effective treatment in enhancing shelf life of fruits with acceptable quality fruits for 14 days of storage.
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