The Influence of Green Works on Seyve-Villard 18402 Grapes Quality, Vine with Biological Resistance
Abstract
Abstract. The reason which Vitis hybrid direct producersand many Vitis intraspecific hybrid cultivarsare increasingly studied in recent times, is theirresistance to diseases and pests, which is superior than noblevines.The influence of some green works on grapes quality in Seyve-Villard 18402 cultivar it`s presented in this paper. Theapplied green works were: shoots thinning, shoots tipping, removal of syllepticshoots and partial defoliation. Thestudies were carried out in 2012, in the experimental field from the didacticcollection of UASVM Cluj-Napoca were focused on quality items such as: acidity,sugar content, pH level, weight of 100 grapes and carotenoids (lutein and β-carotene) content. Theexperience was organised on 3 variants having 3 replicates each, as it follows:V1 - without green works, V2 - shoots thinning, shootstipping, V3 - shoots thinning, shoots tipping, removal of syllepticshoots and partial defoliation. Registered results show that the biggest valuesof acidity (5.7 g/l H2SO4), sugar content (237.6 g/l), pHlevel (5.3), and medium weight of 100 grape berries (211.3 g) were obtainedwithin V3 - shoots thinning, shoots tipping, removal of syllepticshoots and partial defoliation. Carotenoids content was also determined. Usinghigh-performance liquid chromatography (HPLC) technique, lutein and β-carotene were identified. Their dosagewas made using calibration curves for carotenoid standards. Most parameters studied had the highest values ​​in the V3, which were made 4green works.
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