1. Department of Biology, Ecology & Biodiversity Research Unit, Vrije Universiteit Brussels, Brussels, Belgium
2. Department of Zoology & Entomology, Centre for Biological Control, Rhodes University, Makhanda, South Africa
3. Botany Department, Centre for Biological Control, Rhodes University, Makhanda, South Africa
4. Multidisciplinary Institute for Teacher Education, Science and Technology (MILO), Vrije Universiteit Brussel, Brussels, Belgium