Improving Yield and Bunch Quality of ‘Crimson Seedless’ Grapevines Through the Use of Some Elicitors and Shoot-Topping Under Semi-Arid Conditions

Document Type : Original research paper

Authors

1 Horticulture Department, Faculty of Agriculture, Tanta University

2 Horticulture Department, Faculty of Agriculture, Zagazig University

3 Viticulture Research Department, Horticulture Research Institute, Agricultural Research Center

4 Viticulture Department, Horticulture Research Institute, Agriculture Research Center

Abstract

The current study was carried out on "Crimson Seedless" grapevines in the experimental farm at El-Baramon station, Horticulture Research Institute, Mansoura, Dakahlia Governorate, Egypt, for two consecutive seasons (2023 and 2024). The application of shoot-topping treatment (vegetative apex removal before the berry color stage) with foliar of spraying proline at 500 mg/L, melatonin at 500 µL/L, and methyl jasmonate at 500 µL/L. The whole grapevines were sprayed until dripping at three different times; after berry set, at the beginning of berry coloring (veraison stage) and seven days after veraison stage. While, control was sprayed with distilled water and without soot-topping. The combination with proline at 500 mg/L + shoot topping was effective in improving wood ripening and pruning weight as well as enhancing yield per vine, bunch weight, length and width, berry weight, and berry firmness. While a combination of 500 µL/L methyl jasmonate + shoot topping was the best treatment for increasing soluble solids content, anthocyanin accumulation, and total sugars and reducing titratable acidity.

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