PHENOLOGY OF WINE GRAPES IN THE SERRA GAÚCHA REGION
Abstract
Field experimental data from a ten-year period were utilized to characterize the phenological pattern of twelve cultivars of wine grapes in the Serra Gaúcha region, located in the State of Rio Grande do Sul, Brazil. The phenological phases of budbreak, flowering, veraison, maturation and leaf fall were analyzed in order to describe the phenology and to determine the average number of days for each subperiod. Considering the average date of budbreak, the cultivars could be classified as early (Chardonnay, White Niagara, Pinot Noir, Ives, Riesling Itálico and Concord), medium (Merlot, Cabernet Franc, Isabel Sport and Cabernet Sauvignon) and late (Trebbiano and White Moscato). The cv. Chardonnay had the earliest maturation date, while the cv. White Moscato had the latest one. The vegetative cycle had an average duration of 266 days for the whole set of cultivars, ranging from 245 days for the cv. Concord to 280 days for the cv. Pinot Noir.
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