Effect of Some Natural Oils and Plant Extracts on Fruit Quality of Thompson Seedless Grape Cultivar.

The present study carried out during 2023 and 2024 seasons to investigate the effect of some plant extracts (turmeric extract, moringa leaf extract, black seed oil, jasmine oil and jojoba oil). The obtained results can be summarized as follows: The obtained results cleared that plant extract treatment induced an increase in berry length (cm), berry diameter and shape factor during the two seasons compared to control treatment. Concerning the shape factor, jasmine oil extract gave the highest value followed by jojoba oil 2 and black seed oil 2%. It could be noticed that control treatment gave the lowest values of the three traits. Regarding total soluble solids, all treatments resulted in a significant increase in the berries content of TSS % with the best treatments being black seed oil 2% comparing with control treatment it can be observed form the acidity % compared to the control. The treatments improved reducing sugars percentage in the grape berry juice daring the two study seasons 'with a significant increase compared to the control.