1. New Zealand Institute for Plant & Food Research, Christchurch, New Zealand
2. Plant Health and Environment Laboratory, Ministry for Primary Industries, Auckland 1140, New Zealand
3. Plant & Food Research, Auckland 1142, New Zealand
4. Plant Health and Environment Laboratory, Ministry for Primary Industries
5. Plant & Food Research, Auckland
6. Julius Kuehn Institute, Institute for Epidemiology and Pathogen Diagnostics, 38104 Braunschweig, Germany