1. PPP Programme, SCRI, Invergowrie, Dundee DD2 5DA, UK
2. Biology Department, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent
3. ILVO, Burg. Van Gansberghelaan 96, 9820 Merelbeke, Belgium
4. Laboratory for Agrozoology, Ghent University, Coupure Links 653, 9000 Gent, Belgium
5. NemaLab‐ICAM, Dept. Biologia, Universidade de Évora, 7002–554, Évora, Portugal
6. Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
7. Forestry and Forest Products Research Institute, Tsukuba, Ibaraki 305‐8687, Japan