presentation at the meeting of the expert group on viticulture and wine growing at the Chamber of Agriculture and Forestry of Slovenia, Vršič, Vršič, Juršinci, 24. 8. 2015
B.04 Guest lecture
COBISS.SI-ID: 3971372In 2014, the cycles of vegetation of certain Vitis vinifera subsp. vinifera L. table grape varieties at the University Centre of Viticulture and Oenology Meranovo were monitored. The length of vegetation was established using the BBCH system. The ripening group for each variety (early, middle late, late variety) was determined. When the evaluated varieties reached a sugar content of 65 to 75 °Oe and the evaluators estimated them to be ripe the technological ripeness for each variety was determined. Based on sensory evaluation, an assessment of whether the grape skin and seeds are disruptive took place. ‘Perlaut’, ‘Beogradska rana’, ‘Alioshenkin’, ‘Demir Kapija’, ‘Kardinal’, ‘Muškat plevenski’ and ‘Kosovska rana’ were ranked among early varieties (up to 145 days). ‘Hecker, ‘Xenia’, ‘Rdeča žlahtnina’, ‘Prima’ and ‘Kraljica vinogradov’ were placed in the group of medium late varieties (146 to 165 days). ‘Artemis’, ‘Danlas’, ‘Afus Ali', 'Matilde 'and 'Delhro' were placed among late grape varieties (165 days and more). The seeds were most disruptive in the ‘Beogradska rana’ variety; no evaluator said that the seeds were disruptive in the ‘Artemis’ and ‘Matilde’ varieties. The grape skin was most disruptive in the ‘Danlas’ variety and the least in the ‘Alioshenkin’ variety. Most evaluators would buy the ‘Alioshenkin’ variety, and a few of them would decide to get the ‘Danlas’ variety.
D.10 Educational activities
COBISS.SI-ID: 4349740In 2014, we monitored the development stages of some resistant table grape varieties at the University Centre for Viticulture and Oenology Meranovo. For each variety we monitored how many days had passed from the wool stage (BBCH 05) to the stage when the berries are ripe for harvest (BBCH 89). The stage when the berries are ripe for harvest was determined by sugar content analysis (from 65 to 75 °Oe) and by sensory evaluation of ripeness. The wool stage appeared first (21 March) for the 'Einset seedless’ variety and last (7 April) for the 'Sophie', 'Angela' and 'Schuyler' varieties. According to the vegetation length (from wool stage to the “berries are ripe for harvest” stage) 'Xenia', 'Reflex', 'Prima', 'Black Magic', 'Kyoho', 'Clara' and 'Vierul 59' were placed in the group of early varieties (130 to 145 days). 'Prezentabil', 'Patrizia', 'Primus', 'Galant', 'Karmen', 'Sophie', 'Einset Seedless', 'Angela' and 'Schuyler' were placed in the group of medium late varieties (146 to 165 days). 'Muscat Blue', 'Ontario', 'Terez' and 'Guzun' were placed in the group of late varieties (165 days and more). Sensory evaluation showed that the grape skin was most disruptive in the 'Schuyler' variety and the least in the 'Black Magic' variety. Seeds were most disruptive in the 'Muscat Blue' variety, and the least in the 'Einset Seedless', 'Black Magic' and 'Evita' varieties. Most evaluators would buy the 'Prima', 'Evita' and 'Primus' varieties, and almost no-one would buy the 'Guzun' variety
D.10 Educational activities
COBISS.SI-ID: 4230956In 2015, we studied the length of the vegetation and sensory properties of 81 varieties of table grapes, at the University Center for Viticulture and Enology Meranovo, Faculty of Agriculture and Life Sciences. The length of the vegetation of individual varieties was determined by the system BBCH. Studied varieties were divided into a groups of very early, early, medium late, late and very late, depending on the time of ripening according to a cultivar 'Chasselas rose'. Sensory evaluation was performed by means of tasting the grapes of each variety in technological maturity (65 to 75° Oe). In the period between 11. 8. 2015 and 22. 9. 2015 we conducted five tastings. The varieties were divided according to the color of grape skins and origin (vinifera varieties or interspecific hybrids). The length of the vegetation in average last for 155 days for white, 135 days for the pink and 140 days for the blue varieties. Resistant varieties are not different from varieties of Vitis vinifera L. in quality, because the sensory assessment did not find statistically significant differences between them. The experiment showed that the production in Slovenia is suitable for white, blue and for pink table grape varieties.
D.10 Educational activities
COBISS.SI-ID: 4227884Slovenia has adequate environmental conditions for a production of table grapes, but till today it has not have a list of recommended grapevine table varieties for a sustainable production. After monitoring of more than 100 grapevine varieties for the production of table grapes and after the completion of the project CRP with title “Guidelines of table grape production in Slovenia with the aim to increase self-sufficiency", we selected 15 most interesting and promising ones, which were subjected to the additional measurements at the level of phenology, morphology, quality and sensory. Regardless of the production area, and according to the listed quality parameters, the selected tolerant grapevine varieties for a production in Slovenia are Muscat bleu, Arkadia, Palatina, Prezentabil, Esther, Nero, Katharina and Georg. In addition to tolerant varieties Prima, Ora, Kardinal, Matilda, Kraljica vinograda, Bela žlahtnina and Centennial seedless are also suitable for production at least in the Primorska region. The results confirmed that in Slovenia it is possible to produce table grapes of suitable quality.
B.04 Guest lecture
COBISS.SI-ID: 5396072