Impact of Applying Mixture of Plant Extract and Chitosan on Productivity and Quality of Early Sweet Grapevines

Table grapes (Vitis vinifera) of the cultivar "Early Sweet", which was cultivated in a privet grapevine located at Al Sarririyyah Village, East Samalut, Minia Governorate, was sprayed with different concentration of mixture of plants extract and chitosan thrice, at the onset of growth, immediately after berry set, and one month later during 2023-2024. In an experimental conducted in a randomized block design, with 30 vines duplicated 3 times and contained concentrations of 0.05, 0.1 and 0.2% from mixture of plant extract (turmeric, garlic and green tea) and/or chitosan individually or in combination to become 12 treatments. Treated vines showed foliar application with chitosan was more superior than plant extract, while sprinkle with plants extract at 0.1%+chitosan at 0.1% registered the economical and highest values for studied parameters as cluster aspects, yield and berries physio-chemical quality under the same conditions.