Page 115 - Book of Abstracts

5 International Scientific Online Conference DOI: https://doi.org/10.15414/2021.9788055224015

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RESPONSE AND ABILITY OF THE VINES OF STORGOZIA CULTIVAR
TO RECOVER AFTER HAIL DAMAGE
Iliyan Simeonov, Yordanka Belberova, Tatyana Yoncheva
Institute of Viticulture and Enology, Pleven, Bulgaria; E-mail.: t_ion@abv.bg

The research work was carried out in the period 2017–2019 in an experimental
plantation of the intraspecific red wine cultivar Storgozia, in the Experimental base of the
Institute of Viticulture and Enology (IVE) – Pleven. The objective of the study was to determine
the response and the ability to recover cultivar Storgozia after the extreme meteorological
phenomenon mesocyclone registered in May 2018, accompanied by intense hail and hurricane
wind.
Most of the main shoots in the experimental plantation of the studied cultivar were
broken from the base or at different heights, the leaf mass was torn, most of the inflorescences
were destroyed or severely damaged. The hail damage impact on the actual fertility elements,
the growing strength and the degree of shoots ripening, the yield quantitative and qualitative
indicators, and the grape's chemical composition had been determined for the achieving of the
objective. The study found that the damages caused by hail on the green parts of the vine in
2018 did not have a negative influence on the formation of inflorescences in the winter eyes
and did not affect the vine productivity of cultivar Storgozia next year. The damages caused by
hail at the onset of the vegetation had little effect on the growing strength and the degree of
shoots ripening. The leaves of the main shoots of cultivar Storgozia were significantly smaller
in size in the year with hail compared to the other two years, which was reflected in the size of
the leaves of the lateral shoots that were larger after the registered hail. The total leaf area per
vine had remained almost the same in all three years, as the difference was only in the leaf area
ratio of the main and lateral shoots in 2018 that did not result in disruption of the vital for the
vine plant physiological and biochemical processes in the leaves.
Hail had a considerable negative effect on the structure of the cluster, the berry size, the
yield per vine, and a significant adverse impact on the chemical composition of grapes in terms
of sugars, titratable acids, anthocyanins, and total phenolic compounds.

Keywords: vine, cultivar, response, ability to recover, hail.

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5 International Scientific Conference Agrobiodiversity for Improving the Nutrition, Health, Quality of Life and |114
Spiritual Human Development
November 3 2021
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