D5.C5 Vin Doux Naturels Flashcards
Where are PDOs for VDNs located in France?
- Roussillon (80%)
- Languedoc
- Southern Rhone
What is the climate in all VDN PDOs?
Warm mediterranean
What is the advantage of Roussillon in terms of producing VDNs?
Roussillon is the warmest and driest region and is influenced by the Tramontane wind which leads to greater transpiration from the grapes during the end of ripening, and hence a greater concentration of sugar. This is beneficial meaning less spirit is needed to fortify a wine to a certain level of alcohol while retaining a certain level of residual sugar
What are the major grape varieties that are used to make VDNs?
Muscat and Grenache
What are the viticultural properties of Muscat Blanc à Petits Grains?
- Tolerant to dry weather
- Susceptible to powdery mildew, botrytis bunch rot and mites
What are the viticultural properties of Muscat of Alexandria?
- Tolerant to dry weather
- Susceptible to powdery mildew, botrytis bunch rot
What re the differences between Muscat Blanc à Petits Grains and Muscat of Alexandria?
- Muscat Blanc à Petits Grains has smaller grapes than Muscat of Alexandria, and it is considered to have a greater intensity of aroma and flavour
- Muscat of Alexandria has bigger grapes than Muscat Blanc and achieves high sugar levels
What are the viticultural properties of Grenache?
- Good drought resistance
- Produces high yields, but can be relatively pale in colour unless these are controlled
- Accumulates sugar quickly (good for fortified wines)
- Susceptible to coulure at fruit set, downy mildew, phomopsis and botrytis bunch rot
What are the other grape varieties, other than Muscat and Grenache, that are used for the production of VDNs?
- Grenache Blanc
- Macabeu
- Grenache Gris
What kind of canopy is required particularly for the unaged styles of Muscat?
A shady canopy, to reduce the chances of sunburn and excessive grape shrivelling
Generally what is the maximum yield for the appellations producing VDNs?
30 ha/hL
What is the required minimum level of potential alcohol for the grapes to be picked to produce VDNs?
14.8 % abv
What is the common form of harvesting for the VDNs?
Hand harvesting. There may be several passes through the vineyard depending on the ripeness of the crop
Are late harvest or botrytized characters desired for VDNs?
No
What is the minimum concentration of residual sugar in Muscat and Grenache based VDNs?
- Muscat: 100-125 gr/L
- Grenache: 45 gr/L (in practice many are around 100 g/L residual sugar)
Which spirit is used for the fortification of VDNs?
Neutral spirit of 95–96% abv
At which stage of fermentation, fortification is performed for VDNs?
When the fermentation reaches 5–8% abv to makes wines of 15–18% abv
Why do the VDNs not have spirity character?
Because only approximately 5–10 per cent of the volume of the wine is made up of the fortifying spirit
What are the common winemaking practices for the VDNs made from the white grapes?
- The grapes are pressed and the must is fermented off the skins
- The must and wine will also be protected from oxygen through the winemaking process, again to retain fresh primary aromas.
- A period of skin contact (e.g. 6–24 hours) prior to fermentation may be used to extract greater aroma)
- The winemaker may choose to blend press juice with the free run juice for extra body and texture, or keep them separate as desired
- For unaged VDNs, the must may be chilled and stored for a period of months and then fermented based on demand, to ensure the wines produced are as fresh as possible
What are the common winemaking practices for the VDNs made from the black grapes?
- The must is fermented and fortified whilst in contact with the grape skins (the addition of the fortifying alcohol increases the extraction of colour, flavour and tannins)
- Maceration on the skins can continue for a couple of weeks past the fortification date to maximise extraction
- Cap management techniques such as pumping over and punching down are also used to maximise extraction
What is the preferred vessel for the fermentation of white and red VDNs?
Stainless steel
What are the fermentation temperatures for white and red VDNs?
- White: Around 15°C
- Red: Around 28°C