**Author details**

Lindy J. Rose<sup>1</sup> \*, Sheila Okoth<sup>2</sup> , Bradley C. Flett<sup>3</sup> , Belinda Janse van Rensburg<sup>3</sup> and Altus Viljoen<sup>1</sup>

\*Address all correspondence to: lindym@sun.ac.za

1 Stellenbosch University, Stellenbosch, South Africa

2 University of Nairobi, Nairobi, Kenya

3 Agricultural Research Council, Potchefstroom, South Africa
