Effect of anti-hail net on production and quality of ‘Rose Niagara’ grapes grown in Serra Gaúcha region, south Brazil

In the Serra Gaúcha region, South Brazil, occurrence of hail is common due to relief and cold air currents coming from polar regions. Nowadays, use anti-hail nets protect fruit production increasing, but real effects using this coverture on vines are largely unknown. Thus, work aimed evaluate impact an net productivity quality parameters ‘Rose Niagara’ grapes grown in 2019/2020 2020/2021 harvests. The studied were production, number bunches per plant, bunch length, berry diameter, mass 100 berries, average mass, juice pH, titratable acidity, soluble solids, phenolic compounds content, total anthocyanins photosynthetically active radiation. results showed that influenced some parameters, change was not consistent two harvests, indicating a larger influence edaphoclimatic conditions than net. may be alternative vineyards other bad weather conditions, without having important negative impacts grapes.