• Die insekplaagkompleks op sitrus te Vaalharts 

      Mathewson, Johanna (Stellenbosch : Stellenbosch University, 2000-03)
      ENGLISH ABSTRACT: The cultivation of citrus in the Vaalharts region is a fairly recent development. With the introduction of this crop, an insect pest complex has also developed in this region. The presence of these pests ...