1. Shiraz SA Technical Workshop 15 November
The effect of bleeding and stems on Shiraz
Riaan Möller

2. Shiraz History DUREZA MONDUSE BLANCHE Hi sexy! Hey gorgeous!
The first confirmation in SA: Groot Constantia
In 1957 first Shiraz bottled as a single cultivar under the Bellingham label
MONDUSE BLANCHE

3. Vineyard Info Eenzaamheid Agter-Paarl 2004
SH22, Richter 110, 3m x 1,5m
7-strand double lengthend Perold
E-W row direction
Granite, Klapmuts soil type
Dry land
500mm rainfall (238mm in 2015)
Harvested 8 February
Location of the vineyard

4. Vineyard Info

5. Vineyard Info

6. Vineyard Info

7. Winemaking Destemmed & Crushed D254 yeast
Co-inoculation Oenococcus oenie
25°C
Drain & Pres at -1°B
Post MLF 50ppm SO2 addition
Bottled under screw cap

8. Bleeding Extracting of juice after crushing and before fermentation
Do before colour disperses in juice
10% - 50% concentration
Depends on ripeness
Disadvantage:
Unstable colour
Over extraction
Less volume
Costly
< 140g/100 berries
Before additions – TA problematic
More effective or necessary with high sugars

9. Stems/Whole Bunch Very specific to Shiraz Stems:
Adding of destemmed stalks and berries in tank
Dispersed or at bottom of tank
10% - 30%
Whole bunch:
10% - 100%
Different stems have different effect
E.g. clonal effect

10. Stems Benefits: Enhances mouth feel Complex flavour profile (Spicy)
Adds freshness and vibrancy
Better fermentation, e.g. aeration, mixing, press
Mouth feel: not in warmer regions

11. Stems Problems: Over extraction Green (Hot areas) Tannic
Rise in pH – Susceptible to Bret/bacteria
Slight decrease in colour

12. Analysis After MLF: 6 Months: Wine 1 1201 685 65 Wine 2 1502 649 69
Tannins
Anthocyanins 
Total Phenolics
Wine 1
1201
685 65
Wine 2
1502
649 69
Wine 3
1511
744 74
Wine % 3% 20%
Wine
Wine
Tannins
Anthocyanins 
Total Phenolics
Wine 1
894
660 52
Wine 2
1211
606 58
Wine 3
1325
776 65

13. Flavour Profiles
Wine 1 Blue berries, hints of spice, smooth Wine 2 Dark fruit, tobacco, old world textured, pepper Wine 3 Berries, intensity, colour, structure

14. Thank You’s
University of Stellenbosch Eenzaamheid