The Ohio State University, Department of Botany and Plant Pathology Research Project Records contains research and administrative files related to the development of fungicide fruit sprays to control Apple Scab. Files topics include the Fruit Spray Service, spray service areas, reports, Apple Scab data, and radio talks about the Spray Service. Materials in the collection from 1924 to 1963.

The majority of the materials in the Ohio State University, Department of Horticulture, Fruit Spray Service Records are maps of Ohio with various notes written on them indicating fruit crop spraying, stages of growth, and diseases. The collection also contains reports filled out by plant pathologists on spray services performed in specific geographic areas, some notes on field crops, and telegram correspondence.