1. Centre for Biological Control, Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Makhanda, 6140, South Africa
2. Agricultural Research Council – Plant Health and Protection, Private Bag X6006, Hilton, 3245, South Africa
3. Statistics in Ecology, Environment and Conservation (SEEC), Department of Statistical Sciences, University of Cape Town, Rondebosch, Cape Town, 7701, South Africa
4. Afromontane Research Unit and Department of Plant Sciences, University of Free State, Qwaqwa Campus, Phuthaditjhaba, 9866, South Africa