The effect of harvest time and vintage year on the phenolic composition of Nero and Bianca wines

Abstract Fungal disease resistant (PIWI) interspecific grape varieties are playing an important role as alternative for organic wine production. Organic (bio) wines demanded by numerous conscious consumers around the globe. They choose this kind of predominantly because absence synthetic pesticides, fertilisers and sustainable agriculture. Resistant growing moreover results in additional environmental health benefits. Nero Bianca among Hungary's most promising cultivars gaining international interest recently, there are, however, limited vitivinicultural knowledge on them. Our aim was to examine flavonoid anthocyanin composition both during different harvest times two consecutive vintages. The date vintage played a significant effect quality.