Viticulture

Question 1

Which viticulture issue results in uneven berry ripening and size?
A. Esca
B. Coulure
C. Powdery mildew
D. Millerandage

Answer 1

Millerandage

Question 2

Which rootstock grape species is native to deep limestone soils?
A. Vitis riparia
B. Vitis rupestris
C. Vitis berlandieri

Answer 2

Vitis berlandieri

Vitis riparia- sand/loam/clay
Vitis rupestris - loam/calcareous

Question 3

Which of the following is a fungal trunk disease?
A. Grapevine yellows
B. Pierce’s disease
C. Powdery mildew
D. Esca

Answer 3

Esca

Question 4

Which of the following soil textures is considered MOST resistant to phylloxera?
A. Silt
B. Sand
C. Clay

Answer 4

Sand

Question 5

Which of the following training systems is called “pergola” in Italy?
A. Lyre
B. Tendone
C. Geneve
D. Gobelet
E. Guyot

Answer 5

Tendone

Question 6

When does the annual life cycle of the vine begin? When does this happen?

Answer 6

budbreak; occurs in March or April in Northern Hemisphere

Question 7

At what age will the grape vine’s yield begin to decline? At what age is it uneconomical to maintain a grape vine?

Answer 7

After 20 years yield declines; after 50 years it becomes uneconomical though exceptions exist as the naturally low yields can produce incredible concentration in grapes such as old-vine Zinfandel and Rhône varieties

Question 8

What is an example of a head-training method that requires a trellis?