How does the removal of leaves affect grapevine pruning?

The removal of leaves during grapevine pruning plays a significant role in maintaining the health and productivity of the plant. Selectively removing leaves is beneficial as it improves airflow within the vine canopy. Improved airflow helps to reduce humidity, which can lead to fungal diseases such as powdery mildew and botrytis bunch rot. Additionally, by allowing better air circulation, there is also enhanced light penetration, which is crucial for the proper maturation of grapes.

Retaining some leaves while selectively removing others helps in balancing the vine's health and maximizing grape quality. Leaves play a vital role in photosynthesis, but too many leaves can create a dense canopy that restricts airflow and light access. Therefore, strategic defoliation, rather than total removal, supports the overall health of the vineyard and contributes to better grape quality and yield.