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International Journal of Agricultural Research
Year: 2014  |  Volume: 9  |  Issue: 1  |  Page No.: 1 - 16

Effect of Jojoba Oil and Boric Acid as Postharvest Treatments on the Shelf Life of Washington Navel Orange Fruits

M.E. Tarabih and M.A. El-Metwally    

Abstract: This study intended to revise the effect of postharvest dipping in boric acid and/or jojoba oil alone on quality of Washington Navel orange fruits through marketing period at 18°C. The experiments were carried out during 2011 and 2012 seasons. Results showed that all dipping treatments of orange increased fruit quality when compared with the control. Boric acid (1.0%)+jojoba oil (0.1%) treatment gave maximum reduction in linear growth and dry weight of Penicillium digitatum and P. itelicum, as well as disease infection (0.0%) caused by both fungi in the two seasons. The same treatment decreased weight losses percentage, fruit decay, total losses in fruit, titratable acidity and ascorbic acid oxidase. On the other hand, increased soluble solids, SSC/acid ratio, ascorbic acid content, peel thickness and juice percent. The recommendation of this study, the combination treatment of boric acid (1.0%) plus Jojoba oil (0.1%) was the most effective treatment in decreasing disease infection percentage of the tested pathogenic fungi as well as weight losses, fruit decay, total loses in fruit, titratable acidity and ascorbic acid oxidase. However, increasing the quality of fruits was reported by such treatment.

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