Authors :
A. S El_Khawaga; Mahmoud Abbas Ali; Mohamed M. Mostafa; Mohamed R. Eletmany
Volume/Issue :
Volume 9 - 2024, Issue 1 - January
Google Scholar :
http://tinyurl.com/3j3hmb55
Scribd :
http://tinyurl.com/ma7byv63
DOI :
https://doi.org/10.5281/zenodo.10612846
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.
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.
