1. Bio‐Protection Research Centre Lincoln University Lincoln 7647 New Zealand
2. School of Biological Sciences University of Canterbury Christchurch 8140 New Zealand
3. Department of Plant Pathology University of California Davis Davis CA 95616‐8751 USA
4. BIOGECO INRA Univ. Bordeaux 33610 Cestas France
5. Landcare Research, Ecosystems & Global Change Lincoln 7640 New Zealand
6. Department of Biology University of British Columbia Okanagan Campus Kelowna BC V1V 1V7 Canada
7. Grupo de ecología de invasiones INIBIOMA CONICET‐Universidad Nacional del Comahue Bariloche 8400 Argentina
8. Departments of Botany and Bacteriology University of Wisconsin‐Madison Madison WI 53706 USA
9. CSIRO Agriculture & Food GPO Box 1600 Canberra ACT 2601 Australia
10. Scion 49 Sala Street Fenton Park Private Bag 3020 Rotorua 3046 New Zealand