Uman National University | today: 05/31/2026
| Author(s) |
Кирієнко М. В., , , Zamorskyi V.V., Doctor of Agricultural Sciences, , Uman National University of Horticulture, Ukraine |
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|---|---|---|---|
| Category | The Agronomy | ||
| year | 2026 | issue | Issue 108 part 1 |
| pages | 316-323 | index UDK | 634.11:634.1-5:634.1.055:634.1.076 | DOI | 10.32782/2415-8240-2026-108-1-316-323 (Link) |
| Abstract | In recent years, viticulture in Ukraine has been characterized by a trend toward expanding the cultivation area into more northern regions, particularly the Right-Bank Forest-Steppe. This is due both to rising average annual temperatures and to the economic benefits of diversifying viticulture. At the same time, the winter hardiness of grapevines remains one of the main limiting factors. According to recent studies, winter conditions in this zone are marked by significant variability. Sharp temperature fluctuations, unstable snow cover, frequent thaws, and recurring frosts have been recorded. It is precisely these factors that significantly reduce the adaptive potential even of relatively frost-resistant varieties. The winter hardiness of grape varieties was studied in the Right-Bank Forest-Steppe region of Ukraine. The vineyard was established on the plantations of the Educational and Production Department of Uman National University in 2022. The study was conducted in the spring of 2026. The study focused on table grape varieties: Lora, Original, and Tairyan. Technical varieties were also studied: Rubin Tairovsky, Muscat Odessky, and Zagrey. In the Original variety, intense browning of the pith and vascular tissues has been observed, accompanied by partial destruction of the cambium and the formation of necrotic areas. This pattern of damage indicates a significant impact of low temperatures on the anatomical structure of the shoots. Based on a point scale, the damage level corresponds to 4 points, characterizing the variety as having low winter hardiness. In the Tairyan variety, partial browning of the vascular tissues and heartwood was observed, while the cambium layer was preserved in fragments. The damage is localized and does not lead to a complete loss of tissue functionality. The degree of damage was rated at 3 points, corresponding to an average level of winter hardiness. In the Lora variety, the shoot tissues have largely retained their natural light color; the cambium and vascular system have not suffered significant damage, with only slight browning observed in isolated areas. This indicates a high level of adaptation to low temperatures. The rating is 1 point, characterizing the variety as highly winter-hardy. It has been shown that in 2025, there was a decrease in bud survival rates ranging from 2.0% to 6.4%, depending on the variety. The most significant decrease was observed in the Taiyan (-6.4%) and Zagadka (-5.3%) varieties. Minimal changes were observed in the Kometa and Zagrey varieties, which may indicate a certain stability in their response to temperature. It was found that the Lora variety was the most resistant to low temperatures among table grape varieties, while the Original variety was highly susceptible to frost. The Tairyan variety occupied an intermediate position. The Muscat Odessky variety demonstrated the highest winter hardiness among industrial varieties (1–2 points). The Rubin Tairovsky variety was characterized by an average level of hardiness (3 points). The Zagrey variety exhibited low winter hardiness (4 points), which limits its adaptive potential in the conditions of the Right-Bank Forest-Steppe | ||
| Key words | grapes, winter hardiness, table and wine grape varieties | ||