Graham Matthews graduated at Imperial College, London as an entomologist in 1957. In 1958 I went to Southern Rhodesia (now Zimbabwe) and Nyasaland (now Malawi) to do research on control of insect pests of cotton crops. In 1967, I returned to Imperial College, but was seconded to Malawi in 1968 to follow up previous research there, which involved a study on ultra-low volume spraying of cotton, as farmers had difficulty obtaining enough water to spray with a knapsack sprayer. In 1972, I returned to Imperial College and remained at Silwood Park campus until I retired in 2001. In 1974 I obtained my PhD and later received a DSc. Over this period I did teaching, including special courses for overseas visitors and research on Pesticide Application and supervised students doing their Doctorate. The research unit was known as the International Pesticide Research Centre (IPARC). I also did tests of different sprayers for WHO in relation to controlling mosquitoes, and since retirement did some training courses for WHO. I visited numerous countries, including Brazil, China, Colombia, Egypt, Kenya, South Africa, Sudan, Tanzania, Turkmenistan and Uzbekistan, to advise on crop protection. Visits to certain countries, including Australia, Cameroon, Ethiopia, India, Malaysia, Nigeria, Pakistan and Zimbabwe were to participate in training courses on pesticide application. I have published several books between 1979 and 2022, notably Pesticide Application Methods, Pesticides, Health, Safety and the Environment, Pest Management, Cotton Pests and their Management, Integrated Vector Management, A History of Pesticides, and Pest Management in Cotton: A Global Perspective.