Increasing exposure of fruit zone to sunlight allows greater light penetration and better spray penetration for coverage of fungicides:
Leaf removal improves grape quality – improve flavour compounds, colour, decrease titratable acidity, pH and reduce vegetative aromas in some cultivars.
Studies have shown that dense canopy and poor sunlight exposure results in poor quality of wine. Red varieties in cool climate grape-growing regions benefit especially with an increase in intensity of the berry colour and, therefore the wine.