Rootstocks

Question 1

Which 4 things can rootstocks help with?

Answer 1

Pests
Water
Soil PH
Vigour

Question 2

How can rootstocks help with pests?

Answer 2

Phylloxera and rootknot nematodes.
Ramset and Dogridge.

Question 3

How can rootstocks help with water?

Answer 3

1. Hybrids of v.rupestris and v.berlanderi- 110R and 140R= high tolerance of drought= ability to root deeply and quickly.
2. V.riparia- Riparia Gloire= tolerant of water logged soil= useful in high rainfall regions.
3. V.berlandieri- tolerant of soils with high salinity- 1103P

Question 4

How can rootstocks help with soil PH?

Answer 4

Acidic soils (low PH)- hybrids of v.rupestris and v.berlandieri= 99R/110R.
High limestone content (high PH)- 41B- V.berlandieri

Question 5

How can rootstocks help with vigour?

Answer 5

Low vigour rootstocks= advance ripening- useful in cool climates. V.riparia- 420A/3309C.
High vigour rootstocks= v.rupestris- 140R- useful if want to boost vine growth and yields with infertile soil and dry conditions.
Also useful for style- eg sparking (high yields, delicate aromas).