Publication Date: 2024/02/03
Abstract: Bud dormancy breaking agents are important for grape production in warm winter climates. This study evaluated mugwort, chicken manure, lupine seed, and licorice extracts as partial replacements for the synthetic dormancy breaking agent dormex on 'Superior' grapes in Qena, Egypt over two seasons (2022-2023). Treatments were applied once in January and included dormex alone (2, 4, 8%), plant extracts alone (20%), and combinations of dormex (2, 4%) with each extract (20%). Effects on bud behavior, bloom, growth, leaf nutrition, and yield components were assessed. All dormex and extract treatments advanced budburst and bloom compared to the control. Dormex concentration effects were generally dose-dependent. Extracts enhanced outcomes when combined with dormex versus alone. The licorice extract consistently showed greatest efficacy for improving budbreak, yield, growth, and nutritional parameters. Dormex at 8% and dormex at 4% + licorice maximized metrics overall. The results indicate licorice extract holds promise as a partial bio-alternative to improve bud release and productivity in warm grape regions.
Keywords: Licorice Extract, Grapevine Budbreak, Marginal Chilling Conditions, Dormancy-Breaking Compounds, Sustainable Viticulture, Endodormancy Release, Bud Physiology, Hydrogen Cyanamide Mechanisms, Grape Yield Optimization.
DOI: https://doi.org/10.5281/zenodo.10612846
PDF: https://ijirst.demo4.arinfotech.co/assets/upload/files/IJISRT24JAN864.pdf
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