Table grape rootstocks in South Africa

CONTENT

Foreword

2 7

Acknowledgements

Introduction

10 10 12 18 23 24 26 28 30 32 34 36 38 40 42

About the trials

1 Rootstock use

2 Compatibility and affinity of scion-rootstock combinations 3 Viticultural characteristics of the 10 major rootstocks used for table grapes

• Ramsey

• Paulsen 1103 • Richter 110 • Richter 99 • Ruggeri 140 • Dog Ridge • US 8-7

• SO4

• Freedom • Harmony

4 Adaptability of rootstocks to soil conditions (physical, chemical and biological) as determined in trials for the period 1989-2016

46 57

5 Guidelines for rootstock selection

References

60

APPENDICES Appendix 1

61

Summary of major findings of rootstock trials concluded from 1989-2016

61

1.1 The status of different table grape rootstock trials in South Africa for the period 1989-2016 1.2 Yield data of South African table grape rootstock trials for the period 1997-2016 1.4 Cane mass data for South African table grape rootstock trials for the period 1997-2016

62

64

66

Appendix 2

68

Poster: The effect of grapevine rootstocks on the performance of Regal Seedless List of figures

69 69

List of tables

8 Table Grape Rootstocks in South Africa