[1] Agr Res Council ARC Infruitec Nietvoorbij, ZA-7599 Stellenbosch, South Africa
[2] Cape Peninsula Univ Technol, Fac Appl Sci, Dept Agr, Wellington Campus,Private Bag X8, ZA-7654 Wellington, South Africa
[3] Univ Western Cape, Dept Biotechnol, ZA-7535 Bellville, South Africa
[4] Stellenbosch Univ, Africa Inst Postharvest Technol, Fac Agrisci, Private Bag X1, ZA-7602 Matieland, South Africa
[5] Stellenbosch Univ, Fac Agrisci, Dept Hort Sci, ZA-7602 Matieland, South Africa