1. Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Horticultural Sciences, Faculty of AgriSciences; Stellenbosch University; Private Bag X1 Stellenbosch 7602 South Africa
2. Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Food Science, Faculty of AgriSciences; Stellenbosch University; Private Bag X1 Stellenbosch 7602 South Africa
3. Department of Horticultural Engineering; Leibniz-Institute for Agricultural Engineering (ATB); Potsdam Germany