What type of training system is often applied to Tokay grapevines?

The vertical shoot positioning (VSP) training system is commonly applied to Tokay grapevines because it promotes healthy growth and fruit production. VSP allows for optimal sunlight exposure and air circulation around the grapevines, which is essential for photosynthesis and preventing diseases. This system involves training the grapevines to grow vertically, thereby facilitating easier maintenance, canopy management, and harvesting. Additionally, VSP helps in managing the density of the foliage, ensuring that sunlight can penetrate the canopy while also allowing for adequate airflow. This method is particularly effective for varieties like Tokay that thrive under such conditions, leading to improved fruit quality and yields.