SATI Beyond The Bunch 2nd Quarter 2026

Table 3. Bunch and berry quality traits of rootstocks in Phase 1. Ramsey is the control.

Acids and sugars

Rootstock

Bunch density 1

Shatter 2

TSS 4

TTA 5

TSS:TTA 3

Harmony

Begin: less ideal. Denau: ideal. Begin: less ideal. Denau: ideal.

Ideal.

Similar to Ramsey. High.

High to medium.

Paulsen 1103

Ideal.

Similar to Ramsey overall but lower at Begin. Moderate. Not significantly different to other rootstocks at Begin. High overall and at Begin. Similar to Ramsey overall but higher at Begin. Similar to Ramsey overall but lower at Begin. Similar to Ramsey overall but lower at Begin.

Similar to Ramsey. High.

Ramsey

Ideal.

Ideal.

Moderate to low.

Not significantly different to other rootstocks.

Richter 110

Begin: less ideal. Denau: ideal.

Less ideal.

Similar to Ramsey. High.

Medium to low.

RS-3

Ideal.

Ideal.

Similar to Ramsey. Low.

RS-9

Less ideal.

Less ideal.

Similar to Ramsey. Low.

Ruggeri 140

Begin: less ideal. Denau: ideal.

Ideal.

Similar to Ramsey High.

SO 4

Begin: less ideal. Denau: ideal.

Ideal.

Similar to Ramsey. High.

1 Bunch density differed between rootstocks at Begin and Denau. 2 Shatter only differed significantly between rootstocks at Yarona. 3 TSS:TTA differed between rootstocks for all sites combined as well as at Begin individually.

4 TSS only differed significantly between rootstocks at Yarona. 5 TTA only differed significantly between rootstocks at Begin.

KEBO TOOLO | PROVAR

The rootstock trials underway at Vorentoe in the Olifantsriver region.

BEYOND THE BUNCH • 11 • QUARTER 2 • 2026