1. ADAS Rosemaund; Preston Wynne, Hereford UK
2. Agriculture and Horticulture Development Board; Stoneleigh Park, Kenilworth UK
3. Rothamsted Research; Biointeractions and Crop Protection Department; Harpenden UK
4. Scotland's Rural College (SRUC); King's Buildings, Edinburgh UK
5. National Institute of Agricultural Botany; Cambridge UK
6. Department of Crop Science; Teagasc, Carlow Republic of Ireland
7. ADAS High Mowthorpe; Duggleby, Malton UK