Vine Cycle Flashcards
Pruning must be done before _____?
Budbreak
When is the best time to prune?
When the buds start looking plump?
Why do new trunks constantly form?
In attempts to reduce problems that old vinifera has with virus, crown gall, and other grape diseases.
What happens at veraison?
Sugars move from leaf system to the fruit.
What is the general daily temperature when budbreak happens?
About 50 degrees F
What grows from the buds?
Shoots
What happens after budbreak if the vine was pruned during the winter?
Vine bleed.
In warm climates, shoots can grow after 4 weeks at what speed?
1 inch a day
How many days after budbreak is flowering?
40-80 days
At the beginning of flowering, what is the only part that is visible?
The calyptra
What happens at fruit set?
The fertilized flower begins to develop a seed and grape berry to protect the seed.
What is the average percentage of fertilized flowers?
30 percent.
How/when does couloure occur?
When there is an imbalance of carbohydrate levels in the vine tissues, so that some berries fail to set or fall off the bunch.
What grape varieties are prone to Millerandage?
Gewurztraminer, Chardonnay clones 1A and Mendoza.
When does veraison begin?
40-50 days after fruit set
