Effect of Ethanol on Berries Quality, Biochemical Content and Shelf Life of Red Globe Grapes

Abstract

Red Globe is one of the important seeded, bold berries and late ripening table grapes cultivar. Due to vagary in climatic variables, mainly temperature, moisture in soil and air affects the quality of grapes. Colour of berries is very relevant aspect in Red Globe grapes. so, the study was conducted at the Instructional Cum Research Farm, ICAR- National Research Centre for Grapes, Manjari Farm, Pune from December 2021 to February 2022 in order to determine the effect of pre-harvest spray of different concentration of ethanol (0%, 10%, 20%, 30%) on the berry quality, biochemical content, and shelf life of Red Globe grapes. Ethanol shows positive effect on color intensity and anthocyanin content as well as physical parameters including average bunch weight, 50 bunch weight, and berry diameter. Ethanol extends the shelf life of grapes when stored at room temperature. Grapes treated with ethanol (20%) recorded lowest rate of fallen berry and ethanol 30 % treatments decreases rate of rotten berry, PLW % and rate rachis browning at 1st, 3rd and 5th day of shelf life as compare to control.