Viticulture Flashcards Preview

Viticulture / Vinification > Viticulture > Flashcards

Flashcards in Viticulture Deck (11):
1

When does budbreak usually occur?

Q image thumb

March or April (Northern Hemisphere)

  • the first small shoots and leaves will break through the buds left intact by winter pruning
  • at this stage, the vine is vulnerable to frost. 

3

When does flowering occur?

6-13 weeks after the initial budbreak, depending on the climate

4

What takes place during flowering?

Embryo bunches (small green clusters) bloom into small flowers for about 10 days, and the self-pollinating grapevine begins the process of fertilization, which leads to fruit set

- As the vine flowers, it is extremely susceptible to the damaging effects of cold, frost, and wind

5

What happens during veraison?; when does veraison occur?

Sugars are moved from the leaf system to the fruit, and the grapes begin to truly ripen. The grapes soften and change color - turning from green to red-black or yellow-green - and acidity decreases. 

Veraison usually occurs in August (Northern Hemisphere)

6

When does cane ripening occur?

In tandem with veraison (in August), as the stems on each shoot begin to lignify, accumulating carbohydrates to sustain the plant through the winter

7

What is vendange?

harvest

8

What is the preferred mean annual temperature for vines?

btwn 50 - 68°F, with an ideal of 57 °F

9

What is the avg. summer temperature required for red grapes to successfully ripen?

70°F

- white grapes prefer an avg. summer temperature of 66°F

10

What is photosynthesis?

With the aid of sunshine, plants convert carbon dioxide into organic compounds, including sugars

11

Explain cordon training. 

cordon training - the vine has at least 1 permanent cane that extends from the trunk called and arm or cordon. The arm or cordon grows thick and gnarled over time, and has fruit-bearing shoots will emerge from it each season. 

 

A image thumb
12

What is the min. amount of sunshine required to support viticulture?

1,300 hours