Physiological Defects

Physiological Defects

Internal quality defects receiving attention are watercore (Forelle), mealiness (Forelle) and internal browning (Fuji and Rosy Glow). It has been confirmed that the more-exposed outer canopy Forelle have the greater the propensity for mealiness. As is often the case, internal defects do not manifest in seasons subsequent to when they were major problems. Nevertheless, knowledge of their potential causes has greatly increased.

Expertise

  • DPA Focus Group

Projects list

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

New Projects
  • Fuji browning types explored via x-ray CT in collaboration with existing trial. (E Crouch and K Chigwaya)
  • To assess Internal Browning development potential from high watercore incidence FEMA Forelle. (D Viljoen)
Current Projects
  • Post-harvest ‘Forelle’ (Pyrus communis L.) mealiness influenced by shading the outside canopy fruit. (E Crouch, R Cronje, W Fourie and L Schoeman)
  • Identification of factors involved in the expression of internal browning in Fuji apples and the development of a strategy to reduce risk of incidence. (D Viljoen)
Completed Projects
  • Preliminary study to assess Internal Browning development potential from high watercore incidence FEMA Forelle. (D Viljoen)
  • Physiological profiling on ‘Rosy Glow’ apples harvested at different maturities, with special reference to internal browning development potential. (H Tayler and A de Kock)