1. Sogn & Fjordane University College; PO Box 133 6851 Sogndal Norway
2. Institute of Applied Ecology; Fujian Agriculture & Forestry University; Fuzhou China
3. Graham Centre for Agricultural Innovation (NSW Department of Primary Industries and Charles Sturt University); Charles Sturt University; Leeds Parade, PO Box 883 Orange NSW 2800 Australia
4. Bio-Protection Research Centre; Lincoln University; PO Box 85084 Lincoln 7647 Canterbury New Zealand