• Citrus black spot is absent in the Western Cape, Northern Cape and Free State Provinces 

      Carstens, Elma; Le Roux, Hendrik F.; Holtzhausen, Michael A.; Van Rooyen, Liezl; Coetzee, Joey; Wentzel, Ria; Laubscher, Wilhelm; Dawood, Zorina; Venter, Elrita; Schutte, Gerhardus C.; Hattingh, Vaughan; Fourie, Paul H. (Academy of Science of South Africa, 2012)
      The South African citrus industry is strongly focused on exports and South Africa is a signatory member of both the World Trade Organisation Agreement on the application of Sanitary and Phytosanitary Measures and the ...
    • Quarantine status of selected fungal pathogens on Malus, Prunus and Vitis species 

      Carstens, Elma (Stellenbosch : Stellenbosch University, 2006-04)
      ENGLISH ABSTRACT: Invasions of alien species into non-native environments pose one of the largest, but least addressed international threats to biodiversity, both within natural ecosystems and agricultural settings. It ...