Viticulture and Winemaking

Question 1

The vine emerges from dormancy at which temperatures?

Answer 1

10 C / 50 F

Question 2

Budbreak usually occurs in?

Answer 2

March or April

Question 3

Flowering occurs?

Answer 3

six to thirteen weeks after the initial budbreak

Question 4

Fruit set usually hovers around 30%—the remaining embryo berries “shatter,” falling from the cluster, a process also known as?

Answer 4

coulure

Question 5

What is millerandage?

Answer 5

Some grape flowers fail to fertilize. They go on to mature at different rates; some grow ripe and large, while others stay very small and seedless.

Question 6

What happens during veraison?

Answer 6

During veraison, the grapes soften and change color—turning from green to red-black or yellow-green—and acidity decreases. While veraison swiftly affects an individual grape, it may not evenly affect a whole bunch. Some varieties, such as Zinfandel, are characterized by extremely uneven ripening (also called asynchrony), in which veraison haphazardly affects each bunch. Cane ripening occurs in tandem with veraison, as the stems on each shoot begin to lignify, accumulating carbohydrates to sustain the plant through the winter

Question 7

Two types of buds are located at each node, between the leaf and the stem:

Answer 7

lateral buds and dormant buds