Effects of the application of forchlorfenuron (CPPU) on the composition of verdejo grapes

The application of cytokinins such as forchlorfenuron (CPPU) has been widely used in table grape varieties to increase yield and berry size. However, the potential interest these phytoregulators wine grapes have scarcely analyzed. objective this study evaluate influence CPPU treatment on agronomic performance composition Verdejo grapes. trial was conducted 2021, Protected Designation Origin “Rueda” (Spain). applied using a concentration 15 mg/L, by spraying bunches when berries were 5-6 mm diameter. photosynthesis rates stem water potential, measured after application, tended decrease treated plants without modify values ​​of vine vigour. significantly affected content soluble solids total polyphenols must, detecting increases 15.4% 7%, respectively, compared controls. Preliminary results suggest that could improve quality would be interesting apply cultivation conditions where harvest difficulties reach an adequate level maturity, excessive vigour or too cold climate.