Effect of Spraying Chitosan and Algae Extract on Fruiting and Quality of Banaty Grape Vines

This experiment utilized thirty 10-year-old Banaty grapevines throughout the 2022 and 2023 growing seasons, cultivated in a private vineyard located in West Abu Qurqas, El-Minia Governorate, Egypt. In a Completely Randomized Block design with three replicates per treatment, the effects of spraying algae extracts at (0.25, 0.50, and 0.75 g/L) and chitosan at (0.05, 0.1, and 0.2%) were evaluated, as well as their interactions with a total of 10 treatments. The results suggested that all treatments considerably improved the physical and chemical quality, cluster aspects, and yield of the berries. Moreover, the observed beneficial effects were generally in accordance with the increasing dosages of these interventions. The administration of chitosan as an individual was observed to yield the most substantial benefits more than algae extracts. The treatment that included three sprays of algae extracts (0.50 g/L) plus chitosan (0.1%) was the most economically treatment in improving yield, cluster parameters, physical and chemical qualities of berries with decreasing in shot berries and total acidity of Banaty grapevines under Minia conditions.