Rootstocks

Rootstocks and Nursery Tree Quality

Finding more precocious and productive rootstocks adapted to South African conditions is integral to our Orchard of the Future vision. Therefore, various pome and stone fruit rootstocks are evaluated in an increasing number of industry trials in commercial orchards.

Hortgro Science has appointed Provar to run new rootstock trials under the supervision of Dr Xolani Siboza, with input from Dr Piet Stassen and the Rootstock Evaluation Committee. Together with the new funding strategy of rootstock evaluation, which involves co-funding by IP owners and licensees, this increases the number of trials that can be handled. More trials mean better data and hopefully earlier and more confident recommendations regarding new rootstocks. Other rootstock research is aimed at characterising new rootstocks in terms of adaptation and disease and pest tolerance.

Expertise

  • Rootstock and Nursery Tree Quality Workgroup
  • Rootstock Evaluation Committee

Projects list

To read more about these projects click on the title where you’ll be directed to the relevant Annual Report.

New Projects
  • Evaluation of pear rootstocks for the South African industry – Packham’s Triumph in Grabouw. (X Siboza and I Labuschagne)
  • Evaluation of pear rootstocks for the South African industry – Forelle in Wolseley.
    (X Siboza and I Labuschagne)
  • Evaluation of pear rootstocks for the South African industry – Cheeky in Wolseley.
    (X Siboza and I Labuschagne)
  • Evaluation of peach rootstocks for the South African fruit industry at Vaalwater, Limpopo. (P Stassen and I Labuschagne)
  • Evaluation of plum rootstocks for the South African industry at Simondium.
    (P Stassen and I Labuschagne)
Current Projects
  • Evaluation of plum rootstocks. (P Stassen)
  • Evaluation of apricot rootstocks. (P Stassen)
  • Evaluation of peach rootstocks. (P Stassen)
  • Evaluation of new apple rootstocks and interstem combinations in Grabouw. (Oak Valley) (X Siboza and I Labuschagne)
  • Evaluation of new apple rootstocks and interstem combinations in Grabouw (Breëvlei). (X Siboza and I Labuschagne)
  • Evaluation of new apple rootstocks and interstem combinations in the Langkloof (Helderwater). (X Siboza and I Labuschagne)
Completed Projects
  • Apple replant rootstock trials for determining a screening technique. (A Vermeulen)
  • Evaluation of newly bred stone fruit rootstock hybrids for the first and second economy. (S Booi) – Also Stone Fruit Breeding and Evaluation
  • Screening of apple rootstocks for resistance to woolly apple aphid. (C Costa) – Also Integrated Pest Management
Reports Due 2018
  • Apple rootstock evaluation in the Witzenberg valley. (X Siboza)
  • Acclimation of apple peel to light and temperature and the effect thereof on red colour development and tolerance to sunburn. (S Midgley and P Barasu) – see Growing Season Climate
  • Establishing quantitative relationships between water relations, growth, yield and quality of high performing commercial apple orchards. (S Midgley and S Zirebwa) — Also Irrigation and Nutrition