1. Department of Botany and Zoology Stellenbosch University Private Bag X1 Matieland 7602 South Africa
2. Department of Science and Technology (DST)/National Research Foundation (NRF) Centre of Excellence in Tree Health Biotechnology (CTHB) University of Pretoria Pretoria 0002 South Africa
3. Department of Microbiology and Plant Pathology University of Pretoria Pretoria 0002 South Africa
4. Department of Conservation Ecology and Entomology Stellenbosch University Private Bag X1 Matieland 7602 South Africa