Vol. 11, Issue 11 (2022)

An experiment entitled, “Effect of pre and post-harvest application of chitosan on chemical parameters quality of grape Cv. Manik Chaman during storage at 0 °C temperature” was taken in the department of PHM of Fruit, Vegetable and Flower Crops, P.G. Institute of P.H.M., Killa during the year 2017-2018. The study aimed at minimizing post harvest handling losses in table grapes by using following experiment. The experiment was taken in FCRD (Factorial Completely Randomized Design) for different parameters with six main treatments viz. untreated fruits (control), 0.1 % pre-harvest spray and 0.5 to 2% post-harvest dipping of chitosan, with 0, 15, 30 and 45 days storage period at 0 °C temperature and the grape berries were analyzed for the changes in chemical parameters. It was observed that the pre-harvest spray and post-harvest dipping of chitosan treatments recorded delay in increase in reducing sugars, TSS, total sugars and delay in decreasing ascorbic acid, titratable acidity content of grape Cv. Manik Chaman irrespective of treatments. As regards the chemical parameters evaluation, the grape clusters with 0.1 per cent pre-harvest spray and 1.0 per cent post-harvest dipping of chitosan treatment obtained superior results as evaluate to other treatments at 45 days of storage at 0 °C temperature condition. Thus, it is suggested that 0.1 per cent pre-harvest spray and 1.0 per cent post-harvest dipping of chitosan is optimum for grape.