1. Centre for Biological Control, Department of Zoology and Entomology, Rhodes University, Makhanda, 6140 South Africa
2. South African Sugarcane Research Institute, 170 Flanders Drive, Mount Edgecombe, 4300 South Africa
3. Plant Health and Protection, Agricultural Research Council, PO Box 1055, Hilton, 3245 South Africa
4. Centre for Biological Control, Department of Botany, Rhodes University, Makhanda, 6140 South Africa
5. Scientific Services, South African National Parks, Private Bag X404, Skukuza, 1350 South Africa
6. Plant Health and Protection, Agricultural Research Council, Private Bag 134, Queenswood, Pretoria, 0121 South Africa