ESTIMATIVAS DAS ÉPOCAS DE COLHEITA DA VIDEIRA 'NIAGARA ROSADA' NA REGIÃO DO PÓLO TURÍSTICO DO CIRCUITO DAS FRUTAS, SÃO PAULO

The Sao Paulo State region known as “Polo Turistico do Circuito das Frutas” congregates producing ‘Niagara Rosada’ grapevine counties, being responsible for 60% of the state production. For the economical and rational exploitation of that agricultural activity it is necessary to apply the technological advances, mainly on its qualitative and quantitative aspects. Once the previous knowledge of the harvest dates allows the planning of viticultural activities by the producers. Mean monthy maximum and minimum air temperatures were used to acquire the number of days needed for the grapevine to complete growing seasons (pruning to harvest), based on growing degree-days (1549 GDD). Therefore it was possible to elaborate maps for the different probable harvest dates in the “Polo Turistico do Circuito das Frutas” region considering different pruning dates. The ‘Niagara Rosada’ harvest dates for different pruning dates varied from November 30 th to February 25 th when comparing the west and east side of the study area.