Abstract
The experiment was conducted at ICAR- National Research Centre of Grapes, Pune during 2020-2021. The experiment was designed in a randomized block design (RBD) having five treatments and four replications. Pre-harvest sprays of NAA (50 ppm, 100 ppm, 150 ppm and 200 ppm) were taken for application and applied at the veraison stage. The result obtained from this study showed that the higher concentration of NAA (200 ppm) reduces the berry drop, percentage of rotten berries and lowest PLW (%) as compared to untreated vines. The spraying of NAA @ 50, 100, 150, 200 ppm had a significant effect on berry weight, bunch weight, TSS/acidity ratio. The biochemical properties of berries were not influenced by the spraying of NAA at different concentrations. Therefore, the vines applied with a higher concentration of NAA (200 ppm) were found to be effective in increasing the shelf life and yield of Manjri Naveen grapes.
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