1. Sappi Forests (Pty) Ltd, Shaw Research Centre, Howick, South Africa
2. Department of Chemistry, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
3. Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
4. Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa