by Van Niekerk, H.A
Year of Publication 1999

by Scott, D.B., van Niekerk, H.A., Paxton, T.G.
Published in Crop protection (01.06.1992)

by Du Toit, F, Van Niekerk, H.A
Published in Cereal research communications (1985)

by Littlejohn, G.M. (Fynbos Research VOPRI, Elsenburg (South Africa)), Blomerus, L.M, Pienaar, R. de V, Niekerk, H.A. van
Published in Acta Horticulturae (Netherlands) (1992)

by Scott, D.B, Niekerk, H.A. van, Paxton, T.G. (Grain Crops Research Institute, Department of Agricultural Development, Private Bag X29, Bethlehem 9700 (South Africa))
Published in Crop Protection (United Kingdom) (1992)