Unit 2 rootstocks

Question 1

What factors are of concern when choosing a rootstock?

Answer 1

• Vigour
• Preferred soil
• Lime tolerance
• Resistance to drought
• Tolerance to Phylloxera
• Resistance to nematodes

Question 2

Which American rootstock is most suitable to drought conditions?

Answer 2

Vitis-Rupestris

Question 3

Which American rootstock is most suitable to wet/damp conditions?

Answer 3

Vitis-Riparia

Question 4

Other then Vitis Vinifera what rootstock is also lime tolerant?

Answer 4

Vitis-Berlandieri

Question 5

Is Rupestris and Riparia viable in high lime-content soils?

Answer 5

No, they will suffer from chlorosis (iron deficiency)

Question 6

Good rootstocks for acid soils with tolerance to Phylloxera and semi-deep rooting?

Answer 6

Riparia x Rupestris

1. 3309 C (Couderc) (Cool, fertile)
2. 101-14 (Millardet et de Grasset) (Cool, fertile)
3. Schwarzman (Deep, moist)

Question 7

Good rootstocks for high tolerance against chlorosis and Phylloxera, semi-deep rooting and low vigour?

Answer 7

Riparia x Berlandieri

1. 161-49C (Courderc) (Cool, fertile)
2. 420A (Millardet et de Grasset) (Cool, deep, rich)
3. 5C (Teleki) (Chalky clay, compact)

Question 8

Good rootstocks for high tolerance against chlorosis and Phylloxera, semi-deep rooting and high vigour?

Answer 8

Riparia x Berlandieri
1. 5BB (Teleki Selection Kober) (Cold, fertile & wide range)
not to be planted with varieties sensitive to coulure if in fertile soils

2. SO4 Selection Oppenheim (Cold, fertile, humid) most popular in Europe
3. 125AA (Kober) (very wide range) (sensitive against coulure)

Question 9

Good rootstocks for high vigour and tolerance in dry stony conditions, resistance to chlorosis, phylloxera and drought. And also resistant to lime?

Answer 9

Berlandieri x Rupestris
1. 99R (average fert. deep soils) used in south of France

2. 110R (Deep, poor clay-calcareous) Good for dry regions
3. 140RU (Poor and dry soils) Suitable for mediterranean countries
4. 1103P (Poor dry with average compact soils) saline resistant and good for warm climate

Question 10

Good rootstocks for high tolerance against chlorosis, lime content, drought and with poorer resistance to phylloxera?

Answer 10

Berlandieri x Vinifera
1. Fercal (Dry, shallow & calcareous) Mg defiancy if K is applied to great

2. 41B (Millardet et de Grasset) (Dry & calcareous) Used in Champagne and Charentes
3. 333EM (Ecole de Montpellier) (Humid & compact)
   Used in Champagne, Charentes and Midi. Can cause coulure

Question 11

Good rootstocks for high tolerance against nematodes with high vigour and not suitable for quality grapes?

Answer 11

Vitis Champini
1. Dog Ridge (poor and light textured soil)
Weak against phylloxera and lower quality then Schwarzman.