03059naa a2200205 a 450000100080000000500110000800800410001910000180006024501470007826000090022552023670023465000260260165000120262770000180263970000200265770000140267770000190269170000180271077301250272811333762023-06-27       2023    bl uuuu     u00u1 u    #d1 aBRIGHENTI, A.  aVITICULTURAL PERFORMANCE OF RED RESISTANT VARIETIES GROWN AT HIGHLANDS OF SOUTHERN BRAZIL. RESULTS OF FIVE YEAR TRIALS.h[electronic resource]  c2023  aThe occurrence of fungal diseases, caused by high precipitation rates, is the main obstacle to viticulture in Southern Brazil. In  this sense, the cultivation of varieties that combine disease resistance and wine quality (PIWI) can be an alternative to  improve the quality of wines produced, reduce costs and reduce the environmental impact of viticulture. To perform this  work, a collaboration project was developed between Santa Catarina State Agricultural Research and Rural Extension Agency  (Brazil), Santa Catarina Federal University (Brazil), Julius Kuhn Institute (Germany) and Edmund Mach Foundation (Italy) in  order to test the adaptation of resistant varieties in different wine producing areas of Santa Catarina State. The objective of  this work was to evaluate the performance of four red PIWI varieties produced highlands of Santa Catarina State between  2018 and 2022. The evaluated varieties were Regent, Baron, Prior and Calandro. The vineyard was settled in S??o Joaquim  (28??13'S and 50??04'W, altitude 1100m). It was evaluated the date of occurrence of main phenological stages (budbreak, full  bloom, veraison and maturity), productive indexes (number of clusters, fertility index, productivity and Ravaz Index), clusters  characteristics (cluster compactness, and weight) and qualitative indexes of the grapes (soluble solids, total acidity and pH).  On average, Regent presented the earliest budbreak (September 8) and Calandro was the latest (September 18). Full bloom  occurred on average between October 29 and November 4. Veraison occurred on average between December 29 and January  5. The harvest occurred at February 20. On average Calandro and Regent were more productive, with higher cluster number,  productivity and fertility. Prior and Calandro produced heavier, more compact clusters and plants achieved better balance  based on Ravaz Index. All varieties produced grapes with quality levels appropriate for the production of quality wines. Among  the evaluated varieties, Regent and Prior stood out by wine quality. The compact clusters of Calandro make it very susceptible  to damage caused by grape rot (common in areas of high precipitation such as Southern Brazil) and the low productivity and  poor wine quality of Baron seems to indicate difficulties in adapting to the environmental conditions of Southern Brazil.  aVariedades Resistente  aVideira1 aBRIGHENTI, E.1 aSOUZA, A. L. K.1 aHILHA, A.1 aZIMMERMANN, C.1 aMALOHLAVA, I.  tIn: WORLD CONGRESS OF VINE AND WINE, 44., 2023, C??diz/Jerez, Espa??a. Abstracts... C??diz, Espa??a: OIV, 2023. p. 72-73