Flashcards in WSET Advanced Chapter 3 Vineyard Management AKC3 Deck (40)
Fast, full-time harvesting. Vines are shaken and then fallen grapes are collected. The harvest is culled at a sorting table, as the harvester collects everything on the ground. Best for flat or gently-sloping vineyards. Cannot be used for wine styles that require whole bunches, like Beaujolais or Champagne.
Slower, more labor-intensive, but permits grape selection. Essential for botrytised grapes. Stalks are retained. In steep regions like the Mosel, the Douro and the Northern Rhone, there is no choice.
The Vineyard Cyclet: Terms and Dates
Budburst: March/April or Sept/Oct
In the spring, when the avg temp is 10C, buds swell and burst, growing into new shoots. Spring frosts can kill new buds. Earth is taken away from the graft union. Spraying for fungal diseases and pests begins.
Shoot & Leaf Growth
In late spring through summer, shoots grow until the vine flowers. Vine needs water and nutrients. Shoots are trained to the trellis to ensure canopy remains open. Spraying as necessary.
Flowering and Fruit Set
During flowering, vines need 15C temperatures. plus plenty of sunlight and little to no rain, or pollination will be inhibited. Fruit set occurs when a flower starts to develop into a grape. Unpollinated flowers drop off. Spraying continues.
Veraison and Berry Ripening
Veraison is the point that grapes begin to ripen, signaled by a change in the color of the grapes. Until then, all grapes are green, and black varieties turn red and purple, while green ones turn golden and translucent. Birds begin to eat them. Grapes swell with water, sugar levels rise and acid levels drop. Physiological ripening also happens. Requires warmth and sun, and mild stress helps. Summer pruning ensures an open canopy, and green harvesting controls yield and quality. Spraying continues.
Conditions should be dry, or grapes will swell and be diluted, or rot. No spraying.
Cold weather ends growing season. Shoots become woody, vine stores carbohydrate reserves in roots. Leaves fall off and the vine becomes dormant. Earth may be piled on the graft to protect it. Winter pruning takes place.