8 - The annual cycle Flashcards
What is the annual cycle of a grapevine?
The annual cycle of a grapevine includes bud burst, flowering, fruit set, veraison (the onset of ripening), harvest, and dormancy.
When does bud burst typically occur in the Northern Hemisphere?
Bud burst typically occurs in March or April in the Northern Hemisphere.
What happens during bud burst?
During bud burst, buds swell and break open, revealing tiny leaves and shoots.
What is the significance of flowering in grapevines?
Flowering is significant because it determines the number of potential grape berries that will develop, influencing the yield of the vineyard.
When does flowering usually occur?
Flowering usually occurs 6-13 weeks after bud burst, depending on the climate and grape variety.
What is fruit set in grapevines?
Fruit set is the stage when fertilized flowers develop into small grape berries.
What factors can affect fruit set?
Factors such as weather conditions, nutrient availability, and vine health can affect fruit set.
What is veraison?
Veraison is the onset of ripening when grapes change color and begin to soften and accumulate sugars.
When does veraison typically occur?
Veraison typically occurs 40-50 days after fruit set.
What happens during the ripening phase?
During ripening, grapes accumulate sugars, lose acidity, develop color and flavor compounds, and soften.
When is the harvest period for grapevines?
The harvest period for grapevines typically occurs between late August and October in the Northern Hemisphere.
What is the significance of dormancy in grapevines?
Dormancy is significant because it allows grapevines to rest and conserve energy for the next growing season.
What are the main activities during the dormancy period?
The main activities during dormancy include pruning and vineyard maintenance.
How does pruning during dormancy benefit grapevines?
Pruning during dormancy helps to shape the vine, control growth, and ensure a balanced yield for the next season.
What environmental conditions are ideal for a successful dormancy period?
Ideal conditions for dormancy include cool temperatures and minimal stress factors such as drought or disease.
