Heroic Viticulture in Itata Valley, Chile: Characteristics and Challenges for the Development of Unique Wines in Southern Chilean Vineyards

The Itata Valley is located in south-central Chile. It is one of the oldest valleys with rainfed viticulture, hillside vineyards, and head-trained vines. It is the valley with the largest number of vineyards in Chile, averaging about 2 ha, mostly planted with patrimonial cultivars due to their importance in producing wine during the colonial period. It has a Mediterranean climate with rainy winters. From a geological point of view, the parent material can be classified into three main groups: weathered metamorphic rocks, granitic origin, and coarse to fine alluvial sediments. The soils vary according to their geological origin. An important part of the vineyards is planted on slopes with complex inclinations ranging from 15° to 30°. The studies that we have developed in the vineyards of the Catena show a high variability in the water status of the plant in the upper zone of the Catena. This high variability of Itata vineyards can be an advantage for obtaining distinctive wines. This type of cultivation is benefited by restrictive conditions for the growth and development of the grapevine, which leads to a naturally stressed grapevine with a higher concentration of secondary metabolites, which favors the production of higher-quality grapes with a unique wine. Nevertheless, the Itata Valley faces several challenges that range from issues related to climate change, such as forest fires, to socioeconomic, and associative problems that hinder wine production and marketing.