Department of Viticulture and Oenology Stellenbosch University Chemical and sensorial composition of 2016 Shiraz SA Wine Challenge winners Prof Wessel du Toit Department of Viticulture and Oenology Stellenbosch University

We all love our jobs!

What makes a competition winning wine? Institute for Grape and Wine Sciences Analytical, technology transfer, sensory, viticulture and oenology Chenin blanc, Sauvignon blanc and Shiraz

Shiraz Challenge Top 12 Shiraz Challenge wines evaluated - both sensory and chemistry 4 wine that scored the lowest marks

Chemical analyses Rotundone Alpha and beta ionone and Damascenone Vanilline, lactones, eugenol, etc. Tannins, anthocyanins, total phenolics

Sensorial analyses Please TASTE the wine in the proposed ORDER from LEFT to RIGHT- randomized Score global quality of each main criteria: appearance nose palate Describe the wines Using The Given Criteria. Please provide 3-5 descriptors to describe the appearance, nose/aroma and palate

Results: Phenolic

Chemical analyses: aroma impact Wine Rotundone ng/L Beta- damascenone µg/L (OT 2-7) Beta-ionone ng/L (OT 90) Alpha-ionone Windmeul 2013 1.5 1.98 139 701 Eagle’s Nest 2013 18 1.14 136 779 Alto 2013 2 0.91 99 913 De Morgenzon 2014 4.5 1.34 107 261 Rickety Bridge 2013 17.5 1.54 95 589 Laborie 2014 1.3 1.22 77 453 KWV Shiraz 2013 1.7 1.39 102 745 Strandveld 2012 13.5 0.86 85 1016 Saronsberg 2014 0.8 1.85 121 319 Cederberg 2014 3.60 163 Fairview 2013 16.6 1.00 60 773 Babylonstoren 2014 2.09 146 384 Wine A 2.4 1.72 140 162

Chemical analyses: wood derived Wine Trans lactone Cis-lactone Vanillin eugenol Windmeul 2013 234 267 59 44 Eagles’ Nest 2013 144 283 249 42 Alto 2013 122 386 129 De Morgenzon 2014 99 209 174 30 Rickety Bridge 2013 88 164 138 25 Laborie 2014 156 417 248 49 KWV Shiraz 2013 162 404 127 48 Strandveld 2012 130 264 75 39 Saronsberg 2014 213 398 214 55 Cederberg 2014 114 253 242 37 Fairview 2013 185 305 258 51 Babylonstoren 2014 232 245 32 Wine A 90 154 118 23

Top 12 Challenge winners Alto Babylonstoren De Morgenzon Rickety Bridge

Top 12 Challenge winners Cederberg Saronsberg Windmeul Laborie

Top 12 Challenge winners Eagle’s Nest Strandveld Fairview KWV

Four lowest scoring wines Wine A Wine C Wine L Wine O

Quality tasting results Wine Mark No of words Sum of citations Windmeul 14,6 ab 33 192 Eagles nest 15.0ab 24 146 Alto 31 175 De Morgenzon 15,1 ab 32 173 Ricketty Bridge 14,3 ab 34 184 Laborie 14,9 ab 215 KWV 15,2 ab 180 Strandveld 29 178 Saronsberg 15,3 ab 35 205 Cederberg 15,4 ab 217 Fairview 16,0 a 174 Babylonstoren 188 Wine A 12,6 b 147 Wine C 13,6 ab 26 148 Wine L 13,1 b 168 Wine O 13,5 ab 162

What can you take home? Judges awarded different styles Marks of these wines very close Faulty, thin wines not received well Award winning wines more complex with more citations

Acknowledgements Producers who donated wines Mihaela Mihnea Jose Luis Alexandre-Tudo Vinlab Institute for Grape and Wine Sciences