G. A. Matthews is Emeritus Professor at Imperial College London, UK. With an extensive career in pest management, Matthews began his research on insect pests of cotton in Africa from 1958 to 1972. At Imperial College, he continued his work in crop protection globally until 2001. Even in retirement, he remains actively engaged in pesticide application research. Roy Bateman was a senior lecturer at the International Pesticide Application Research Centre, Imperial College London, UK. His work includes integrated pest management (IPM) for rice, controlled droplet application, biological locust control, and cacao disease management. Now retired from formal teaching, he continues to be involved in Southeast Asian entomology and agricultural issues.