Content – Leafroll control strategy

1. Cause of leafroll disease

2.1 Recognizing leafroll disease symptoms – Red cultivars

2.2 – 2.3 Recognizing leafroll disease symptoms – White cultivars & rootstocks

3.1-3.5 Disorders that can be confused with leafroll

3.6 Disorders that can be confused with leafroll – Other diseases

4. Vectors of leafroll disease

5.1 – 5.2 Spread of leafroll – clumps & along edges

5.3 Spread of leafroll – random occurrence

6. Effects of leafroll disease

7.-Alternative-control-strategies-for-leafroll-disease.pdf

8. Creation of healthy Vitis planting material

9. Categorisation of vineyards for leafroll control strategies

10.1 Control – Quantifying mealybug

10.2 Control – Chemical control of mealybug

10.3 Control – Release of natural enemies

10.4-Control-Ant-control.pdf

11.-Control-leafroll-spread-by-removing-individual-infected-vines-roguing

12.-Replacing-whole-leafroll-infected-vineyards

13.-Control-of-leafroll-spread-from-external-sources

14.-Examples-of-leafroll-control-in-SA-wine-industry

Inhoud – Rolblaar beheerstrategie

1. Oorsaak van rolblaarsiekte

2.1 Herkenning van simptome van rolblaarsiekte – rooi druifkultivars

2.2 – 2.3 Herkenning van simptome van rolblaarsiekte – wit druifkultivars & onderstokke

3.1 – 3.5 Afwykings wat met rolblaar verwar kan word

3.6 Afwykings wat met rolblaar verwar kan word – ander siektes

4. Vektore van rolblaarsiekte

5.1 – 5.2 Verspreidingspatrone van rolblaar – kolle en rande

5.3 Verspreidingspatrone van rolblaar – ewekansige voorkoms

6. Gevolge van rolblaarsiekte

7. Alternatiewe beheer

8. Maak van gesonde Vitis plantmateriaal

9. Kategoriseer wingerde vir rolblaar beheerstrategiee

10.1 Beheer witluis – Kwantifisering

10.2 Beheer witluis – Chemiese beheer

10.3 Beheer witluis – Natuurlike vyande

10.4 Beheer witluis – Mierbeheer

11. Beheer rolblaarverspreiding deur verwydering v individuele besmette stokke

12. Vervanging van besmette wingerde

13. Beheer rolblaarverspreiding vanaf eksterne bronne

14. Voorbeelde van rolblaarbeheer in SA wynbedryf

Contents

1. Origin and development of mechanical pruning

2. Mechanical vs hand pruning​

3. Influence of mechanical pruning on wine quality

4. Types of mechanical pruning machines and trellising systems

5. Influence on water usage, fertilisation and sustainability

6. List of references

Inhoud

1. Ontstaan en ontwikkeling van meganiese snoei

2. Meganiese teenoor handsnoei

3. Invloed van meganiese snoei op wynkwaliteit

4. Tipes Meganiese Snoeimasjiene en prieelstelsels

5. Effek op waterverbruik, bemesting & volhoubaarheid

6. Meganiese snoei Bronnelys

Contents

1. Origin of mechanical harvesting

2. Influence of mechanical harvesting on yield & vigour

3. Influence of mechanical harvesting on quality of white wine

4. Influence of mechanical harvesting on quality of red wine

5. Types of mechanical harvesters

6. Trellising systems and vineyard layout

7. Conversion of existing vineyards for mechanical harvesting

8. Influence on budding and fertility of grapevines

9. Choosing between mechanical and hand harvesting

10. Cost of mechanical vs hand harvesting

11. Cost comparison between towed and self-propelled harvesters

12. Future of mechanical harvesting

13. List of references

Inhoud

1. Oorsprong van meganiese oes

2. Invloed van meganiese oes op produksie & groeikrag

3 Invloed van meganiese oes op gehalte van witwyn

4. Invloed van meganiese oes op gehalte van rooiwyn

5. Tipes meganiese oesmasjiene

6. Opleistelsels en wingerduitleg vir meganiese oes

7. Omskakeling van bestaande wingerde vir meganiese oes

8. Invloed op uitbot en vrugbaarheid van wingerd

9. Keuse tussen meganiese oes en handoes

10. Koste van meganiese oes en handoes

11. Koste-vergelyking tussen sleep- en selfaangedrewe oesmasjiene

12. Toekoms van meganiese oes

13. Bronnelys

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