1. Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Stellenbosch 7602, South Africa
2. Centraalbureau voor Schimmelcultures, Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands, and Department of Plant Pathology, University of Stellenbosch, Private Bag X1, Stellenbosch 7602, South Africa