Hemijski sastav grožđa sorti vinove loze probus i kaberne sovinjon pri različitim ampelotehničkim merama

The aim of this research was to investigate the effects of different canopy management techniques applied in the vineyard on the grape and wine chemical composition of Probus (Kadarka × Cabernet sauvignon, Vitis vinifera L.) and Cabernet sauvignon. Canopy techniques (treatments) included bunch thinning and leaf removal (performed at three specific time points). Probus is local red variety grown in Fruška Gora wine region suitable for production of highquality wines, while Cabernet sauvignon is an international variety recognized by its high red-wine quality. Probus showed high grape and wine quality and for many parameters was at the level of Cabernet sauvignon. However, Cabernet sauvignon accumulated higher sugar content in the must, and was less susceptible to Botrytis sp. compared to Probus. On the other hand, Probus showed higher skin weight compared to Cabernet Sauvignon and higher ratio of trisubstituted anthocyanins in the wine. Leaf removal and bunch thinning speed up grape ripening which is desirable for late-ripening varieties in Fruška Gora wine region. Depend on the year and variety treatments differently affected grape and wine chemical composition. Improved grape and wine quality were observed after leaf removal treatment applied 7 days after flowering. This treatment decreased titratable acidity of the grape juice and increased total anthocyanins in the wines of both varieties. Moreover, leaf removal applied 7 days after flowering, decreased Botrytis sp. incidence in the vineyard of Probus, which is known to be sensitive Botrytis sp. due to compact bunches. Thus, early leaf removal applied 7 days after flowering is highly recommended in the production of high-quality red wines in Fruška Gora wine region.