 Hume continued to write and publish articles during this time, notably including "The Cultivation of Citrus Fruits" (1926), which became a standard reference in the field.He rejoined the faculty of the University of Florida in Gainesville, Florida in 1930, was appointed dean of the College of Agriculture in 1938, and became the provost for agriculture in 1943.During the early 1930s, He was one of the key researchers working on methods to eradicate the Mediterranean fruit fly infestation that was threatening Florida's citrus industry.