Effect of cellulose based coating on guava in combination with MgSO4 under controlled storage conditions
2015
Ahmad, T.
Guava (Psidium guajava L.) is a vital source of minerals, vitamins, dietary fiber and antioxidants. Highly perishable nature and pruning towards chilling injury, diseases, insect pests and physical damage are the main drawbacks of guava after harvesting. Owing to its delicate nature, postharvest physiology, economic importance, effects of pre and postharvest factors and maturity indices on fruit quality of guava are of prime importance. Onset of different diseases, defects after harvesting and treatments applied after sanitation are of secondary importance. Handling techniques, processes used to ripen and methods used to control the aging process can contribute towards fruit loss up to great extent. In this experiment guava were stored at 10°C with 80% relative humidity after treating with different levels of sulphate salt of magnesium followed by dipping in cellulose based edible coating hydroxyl propyl methyl cellulose (HPMC). Main objectives of this coating were to enhance the shelf life of guava by inhibiting respiration and by binding the dissolved solids with salt application. Characterization of different analysis for quality attributes including physical, physiological and bio chemical analysis were performed after every 5 days interval till the fruit remained edible during storage period of 4 weeks. Finally, data obtained was subjected to statistical analysis. It was concluded on statistical basis that treatment T3 of Gola variety and treatment T6 of Surahi variety (treated with 5% MgSO4) showed best storage stability and kept their original quality up to 26 days during 4 weeks storage period.
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