Agroclimatic risk zoning for Grape cultivation in the Hydrographic Basin of Paraná River III, Brazil

The capacity to adapt the grape into different climates classification and the improvement of technology in the agriculture were fundamental for the expansion of grape production in partly of the national territory, with a significant socioeconomic relevance. The grape is vulnerable due to its sensitivity to fungal pathology, exhibiting the importance of agricultural management techniques and climate studies to improve its production. The purpose of this study was to perform climate risk agricultural zoning for the grape in the Hydrographic Basin of Parana River III, Brazil, western region of the state of Parana. For this, three specific local marketed varieties were selected: Rustic grapes (Vitis labrusca), fine table grapes (Vitis vinifera) and fine grapes for wine (Vitis vinifera). Meteorological data from 43 stations, from 1976 to 2018, were used. The analysis of climatic risk was based on the climatic requirements of the species: Average rainfall, annual water deficiency, average temperature, relative humidity and the risk of frost occurrence. For fine table grapes and rustic grapes for all regions in the basin these two species are recommended for cultivation. However, fine grapes specific for wine were restricted in the eastern portion and in small areas in the southern and western of the basin. Relative humidity and temperature are the key restrictive agrometeorological variable, in the basin.