Effect of four formulations on the dormancy release of dormant buds and the subsequent development of shoots under typical vineyard conditions
One of the key challenges of sustainable viticulture under climate change is the insufficient chilling necessary for dormancy release, leading to uneven budbreak and reduced productivity. This study examined the effect of four formulations: Dormex® (hydrogen cyanamide), Theocopper, Erger (and Activ...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AcademicPres
2025-06-01
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| Series: | Notulae Botanicae Horti Agrobotanici Cluj-Napoca |
| Subjects: | |
| Online Access: | https://www.notulaebotanicae.ro/index.php/nbha/article/view/14555 |
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| Summary: | One of the key challenges of sustainable viticulture under climate change is the insufficient chilling necessary for dormancy release, leading to uneven budbreak and reduced productivity. This study examined the effect of four formulations: Dormex® (hydrogen cyanamide), Theocopper, Erger (and Active Erger), and garlic extract on budbreak in two early-maturity, seedless table grape varieties: ‘Prime Seedless’ and ‘Ralli Seedless’. The research aimed to promote earlier budbreak, control apical dominance, and advance grape ripening. In addition to evaluating the chemical composition and concentration of each treatment, the study also examined the importance of application timing. Field measurements were taken from the grapevine shoots during four stages (one per application), across three consecutive years. The data revealed that both the year and timing of application significantly influenced budbreak and the intensity of acrotony. Different formulations had varying effects on breaking dormancy and modifying growth patterns. Regulating bud dormancy is viticulturally important, as it promotes uniform budbreak, consistent flowering, and earlier, more reliable yields. Effective dormancy management improves grape quality, reduces losses due to irregular budbreak, and mitigates apical dominance, contributing to balanced vegetative growth. This is especially crucial in regions with mild winters, where traditional chilling requirements may not be met. The study supports the strategic use of chemical agents to adapt grapevine cultivation to changing climatic conditions.
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| ISSN: | 0255-965X 1842-4309 |