L. Mabongo1,2*, W. Gestring1, C.L. Howell2, D.E. Elephant1,3
(1) Department of Crop Science, School of Agricultural Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag x2046, Mmabatho 2735, South Africa
(2) ARC Infruitec-Nietvoorbij, Private Bag X5026, Stellenbosch 7599, South Africa.
(3) Department of Agronomy, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
