Ethephon foliar application: Impact on the phenolic and technological Tempranillo grapes maturity

Abstract In recent years, there has been increasing concern about the impact of climate change on viticulture, in particular regarding its influence grape maturity and quality. Extensive research shown that rise temperatures during ripening accelerates accumulation sugars while reducing synthesis phenolic aromatic compounds. The aim this study was to investigate whether foliar application plant growth regulator ethephon might delay technological increase content, improving wine For this, different concentrations were applied two vintages Tempranillo variety at onset veraison. Results showed sugar delayed one vintages, whereas treatment favored compounds both vintages. conclusion, veraison grapevines helped couple maturity, leading more balanced wines, either by delaying or enhancing anthocyanins Practical Application Due current change, grapes does not match with their which means harvested are usually very sweet but without enough color aroma. regulator—ethephon—delays increases quality creating wines balanced.