1. Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa
2. Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
3. ARC‐Plant Protection Research Institute, Queenswood, Pretoria 0121, South Africa
4. Department of Genetics, University of Pretoria, Pretoria 0002, South Africa