Dr Dave Watson is a leading authority on sustainable development and optimising value chains in agriculture. He has taught courses on sustainable development for the University of Hull (UK), as well as managing research and development programmes for the International Livestock Research Institute (ILRI), the International Institute of Tropical Agriculture (IITA) and the International Maize and Wheat Improvement Center (CIMMYT) in Mexico. Dr Watson is editor of the two-volume Achieving sustainable cultivation of maize, also published by Burleigh Dodds Science Publishing. Dr. William (Bill) Hutchison is a Professor and Extension Entomologist at the University of Minnesota, St. Paul, USA. His expertise is applied insect population ecology, as it relates to the development of innovative Integrated Pest Management (IPM) programs for a variety of fruit and vegetable crops. He has also been active in evaluating the long-term sustainability of insect-resistant, genetically engineered (GE) maize, and implementing GE crops into IPM programs. He is also active in international IPM research, with a current US-AID project in East Africa. Professor Per Kudsk is Head of the Crop Health Section in the Department of Agroecology at Aarhus University, Denmark. An internationally-known expert in integrated weed management, he is a former President of the European Weed Research Society. Professor Kudsk has played a leading role in EU research projects such as IWMPRAISE and the ENDURE Network as well as in the European Plant Protection Organisation (EPPO).