الفهرس 
The use of safe and natural alternatives postharvest to improve the quality and storability of grape fruits
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Abstract
This study was conducted during the seasons 2012 - 2013 on crimson seedless grape in order to study the effect of post - harvest treatments by immersion in 1% Chitosan, 0.2%, bergamot oil, 4% calcium chloride, 30% ethanol, 0.2% acetic acid and a mixture of 1% chitosan + 4% calcium chloride compared with the control (untreated) as an alternative to sulfur dioxide (SO2) and to reduce the decay and maintain quality attributes. The treated clusters stored up to 6 weeks at 0{u00B0}C and relative humidity (RH) 90 - 95% to study quality attributes (decay%, loss in weight%, shattering%, firmness, total acidity%, total soluble solids%, vitamin C, total sugars % content of anthocyanin and respiration rate of the clusters during storage periods. Results showed that decay%, and weight loss%, shattering%, T.S.S%, vitamin C loss, anthocyanin content and respiration rate were increased whereas acidity, firmness, berry adherence decreased by increasing storage period. All treatments decreased the decay compared with SO2or control the decay%, the loss of vitamin C, loss in weight%, shattering, total soluble solids%, total sugars% and the content of pigment anthocyanin increases with increasing storage period while total acidity%, firmness and strength berry decreased with increasing storage period, as well as the results showed that all post-harvest treatments reduced decay% compared with control