E.I. du Pont de Nemours & Company's Agricultural Products Department was responsible for the research, development, and manufacturing of organic fertilizers, herbicides, fungicides, insecticides, and other agricultural chemicals. The records include a history of the department, chronology of the benzimidazole fungicide development, history of the technical development of Benomyl, and a small collection of papers from Ralph K. Iler (1909-1985) describing the department's fundamental research program on inorganic chemistry.