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4. / Name 2 most important species of vine - ANSWER ✔✔Vitis
vinifera - eurasian
American vines
4. / Disadvantage & Advantage of american vines ? - ANSWER
✔✔Unattractive flavour of the wines
But resistant to phylloxera - used for rootstocks
,4. / What is phylloxera ? - ANSWER ✔✔Vine pest (insect) that
attacks vine's root
Native from north america
4. / When was phylloxera introduced in europe ? - ANSWER ✔✔End
of 19th century
4. / How phylloxera destroy the vines ? - ANSWER ✔✔Infection enter
through the feeding wounds - vine is weakened and over a few year dies
4 / Places in the world without phylloxera ? - ANSWER ✔✔Yes : chile,
some parts of argentina and south australia.
4. / How to fight phylloxera ? - ANSWER ✔✔- Strict quarantine for
non affected areas.
- plant american species or hybrid
- Grafting vitis vinifera onto rootstock of american vines
4. / What are the 2 grafting techniques existing ? - ANSWER
✔✔Bench grafting - in nurseries
Head grafting - in vineyards
,4. / What is the advantage of head grafting ? - ANSWER ✔✔Quickly
change an establish vineyards to a new grape variety taking advanyage
of established root syst
Grape at next vintage / instead of waiting 3 years
Considerably cheaper than replanting
4. / Four sections of vines ? - ANSWER ✔✔Green parts
One year old wood
Permanent wood
Roots
4. / What are the leaves responsible for ? - ANSWER
✔✔Photosynthesis
4. / What is photosynthesis process ? - ANSWER ✔✔Plant use
sunlight to convert carbon dioxide and water into glucose and oxygen
4. / What are vine flowers representing ? - ANSWER ✔✔Vine
reproductive organs - both male and female
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, 4. / What is inflorescences ? - ANSWER ✔✔A bunch of vine flowers
that if pollinated will become the bunch of grape.
4. / What is a buds ? - ANSWER ✔✔An embryonic shoot for the
following year forming at the joint of the leave and the shoot
4. / What are the roots functions ? - ANSWER ✔✔- absorb water
- absorb nutrients
- anchor vine
- store carbohydrates to survive winter
4. / Criteria for selecting a grape variety ? - ANSWER ✔✔Taste
Quality of fruit
Budding time
Ripening time
Resistance to diseases
4. / Can a variety be grown or propagated through seeds ? -
ANSWER ✔✔No
4. / Name 2 techniques to grow or propagate grape variety without
loosing unique qualities - ANSWER ✔✔Cutting
Layering