Grape-growing and related labelling terms Flashcards
What species of vines is predominantly used for winemaking?
European vines
What are the vine’s needs? (5)
Warmth
Sunlight
Carbon dioxide
Water
Nutrients
Through which process does the vine produce sugar?
Photosynthesis
What is the formula for photosynthesis?
water + carbon dioxide + sunlight => sugar
What elements are found in the skins of the grape? (3)
Colour
Tannins
Flavours
Other than in the skins, where else are tannins found? (2)
Seeds
Stems
What elements are found in the pulp of the grape? (4)
Water
Sugar
Acid
Flavours
Explain what “fruit set” is.
Once the vines’ flowers have been pollinated, they start to grow seeds, begin to swell and become grapes. These grapes are small, hard and green.
What stage of the vine cycle, during which grapes change colour, marks the beginning of ripening?
Véraison
What happens to the water content in the grapes during ripening?
The grapes swell with water and become soft and fleshy.
What happens to the acidity in the grapes during ripening?
The acidity drops.
What happens to the sugar in the grapes during ripening?
The sugar increases.
What happens to the flavours of the grapes during ripening?
Herbaceous flavours decrease and the signature flavours of the grape develop.
White grapes: green fruit to stone fruit to tropical
Black grapes: fresh to cooked fruit
What happens to the wine if the tannins of the grapes are unripe when harvested?
The wine can taste bitter.
What happens to the tannins in black grapes during ripening? (2)
- They develop
- They ripen
What happens to the grapes during the early stages of extra ripening?
The grapes develop exaggerated aromas and develop higher levels of sugar.
What happens to the grapes in the later stages of extra ripening?
The grapes turn into raisins because the water content evaporates.
This concentrates the acids and sugars in the grape.
Dried fruit aromas develop.
What style of wine is commonly made from extra ripe grapes which have been raisined on the vine during extra ripening?
Sweet wines.
What is botrytis?
A fungus that can grow on ripe grapes causing noble rot.
What happens to the contents of the grape when it’s affected by botrytis?
The water inside the grape evaporates which concentrates the acids, sugars and flavours of the grape.
What are the ideal conditions for the development of noble rot?
- Grapes need to be ripe
- Damp misty mornings followed by warm, dry afternoons
What style of wine is produced from frozen grapes?
Sweet wines with concentrated and pure varietal characteristics and high acidity.
Between which months does the growing season run in:
-the northern hemisphere?
the southern hemisphere?
- April to October in the Northern hemisphere
- October to April in the Southern hemisphere-
What are the 3 growing climate categories?
- Cool (avg growing season temperatures 16.5˚C or below)
- Moderate (avg growing season temperatures 16.5˚C to 18.5˚C)
- Warm (avg growing season temperatures 18.5˚C to 21˚C)
Why is temperature so important? What are the 2 things it helps to determine?
- Which varieties can grow successfully
- The flavour characteristics that can develop
At which latitudes north and south of the equator are most vineyards located? Why?
Between 30 and 50˚
If located outside of this range it is likely to be too hot (when closer to the equator) or too cold (when further away from the equator)
What happens to the temperature as the altitude increases?
The temperature drops.
How can warm regions benefit from being close to the sea? Example?
The sea can bring a moderating influence due to cool ocean currents.
For example, cold ocean currents from the South Pole in South Africa
How do ocean currents help grape ripening in the vineyards of Europe?
Warm ocean currents from the Caribbean warm the growing environment.
How can rivers be beneficial in a cooler growing environment? (3)
- Provide warm air to vineyards and help extend the growing season
- Light reflected from rivers can also help ripen grapes
- Protect against frost
How can the air from mountains affect the growing environment?
Cold air descends from mountains at night, cooling down warmer vineyards
How can clouds be beneficial in a warmer growing environment?
Block some sunlight and slow down ripening (because photosynthesis slowed)
Give 2 examples of countries where fog plays an important role in cooling down the vineyards in coastal regions.
California
Chile
What can mountains help shelter vineyards from? (3)
- clouds
- rain
- cold winds
Do vineyards further away from the equator receive more or less sunlight than vineyards closer to the equator?
Less
If a vineyard is located far away from the equator, in the Norther hemisphere, in which direction should the slope’s aspect be to help ripen the grapes?
Facing south (so it faces the equator)
If 2 vineyards are located at the same latitude and one of the is on a slope facing the equator and the other is on flat land, which will ripen grapes easier and why?
The ones on the slope facing the equator.
More sunlight = more ripening
What 2 of the vine’s needs are provided by the soil?
Water
Nutrients
What type of soil can help grape ripening? How?
Stony soil. Stones can absorb heat and radiate back into the vineyard.
What are 6 weather extremes which can cause problems for grape ripening?
- Cool vintages
- Hot vintages
- Drought
- High levels of rain
- Hail
- Frost
What will happen to the structural characteristics and flavours of a wine produced in a particularly cool vintage?
Higher acidity
Lower alcohol and lighter body (due to less sugar)
Signature flavours might not develop
What can happen to the grapes and vines during hotter than normal vintages? (3)
- Grapes can develop uncharacteristic dried fruit aromas
- Vine can shut down and grapes will fail to ripen
- In extreme conditions the vine can die
How can drought be overcome?
Using irrigation
What are the 2 main concerns with high levels of rain?
- fungal disease
- if heavy rainfall is close to harvest, grapes can swell and flavours are diluted
At what time of year is frost a major concern. Why?
Spring.
Can damage and kill the vine’s new growth, reducing number of grapes that can be grown in that year.
What winter vineyard activity helps determine the shape of the vine and the potential amount of grapes produced?
Pruning
In regions with a lack of rainfall, how do growers ensure their vines get enough water?
Irrigation
How can pests like animals and birds be kept away from the grapes? (2)
Fences
Nets
What is the term used to express the amount of fruit (grapes) produced per unit area?
Yield
If the yields are too high, what can happen to the flavours and sugar in the grapes?
Lower sugar levels
Diluted flavours
What will happen to the contents of the grapes if they are harvested earlier in the ripening process?
Lower levels of sugar
Higher levels of acid
Less ripe flavours
What will happen to the contents of the grapes if they are harvested later in the ripening process?
What will happen to the flavours and sugar in the grapes if they are left to shrivel on the vines?
Raisined and dried fruit flavours
Concentrated sugar
Which harvesting method will need to be used for vineyards on steep slopes?
Hand harvesting (machine harvesters can’t be used on steep slopes)
What does GI stand for? How would you define what a GI is?
Geographical Indication
A legally defined vineyard area
What does PDO stand for?
Protected Designation of Origin
What does PGI stand for?
Protected Geographical Indication
Which of the below typically covers a small geographical area and have tightly defined regulations?
-PDO
-PGI
PDO
Name the labelling term in France for PGI
Indication Géographique Protégée (IGP)
Name the labelling term in France for PDO
Appellation d’Origine Controlée (AOC)
or
Appellation d’Origine Protégée (AOP)
Name the labelling term in Italy for PGI
Indicazione Geografica Tipica (IGT)
Name the labelling terms in Italy for PDO (2)
Denominazione di Origine Controllata (DOC)
Denominazione di Origine Controllata e Garantita (DOCG)
Name the labelling term in Spain for PGI
Vino de la Tierra
Name the labelling terms in Spain for PDO (2)
Denominación de Origen (DO)
Denominación de Origen Calificada (DOCa)
Name the labelling term in Germany for PGI
Landwein
Name the labelling terms in Germany for PDO (2)
Qualitätswein
Prädikatswein
Why can older vines produce higher quality wines?
Older vines produce lower yields so the grapes have more concentrated and complex aromas.
What is the French labelling term for old vines?
Vieilles vignes
What does the vintage listed on the label refer to?
The year the grapes used to make the wine were harvested.
True or false: A wine made in Australia labelled 2022 will be about 6 months older than a European wine labelled 2022.
True
How will the body and flavour concentration be different for a wine labelled “Late Harvest”? Why?
Fuller body
More concentration of flavours
Because grapes harvested much later, so grapes are riper, with more sugar and riper flavours
What can the sweetness level be for a wine labelled “Late Harvest”?
Dry, off-dry, medium or sweet
What will be the level of acidity and sugar in grapes affected by Botrytis/Noble Rot?
High sugar
High acidity
What is the level of sweetness in the WINE if labelled Icewine or Eiswein? Why?
Wine is sweet
Because grapes are left to freeze on vine before harvesting, then pressed while water in grapes is still frozen = grape juice is high in sugar and acid