1. University of Bonn, Bonn, Germany;
2. Laboratory of Nematology, Department of Plant Sciences, Wageningen University, Wageningen, The Netherlands
3. Field Crops, Wageningen University and Research, Lelystad, The Netherlands
4. Institute of Food and Agricultural Sciences, Department of Entomology and Nematology, Gulf Coast Research and Education Center, University of Florida, Wimauma, Florida, USA
5. Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
6. Institute of Sugar Beet Research (IfZ), Göttingen, Germany