Ohio State University - Main Campus is one of the most popular schools in the United States for getting a doctor's degree in plant pathology/phytopathology. Located in the city of Columbus, Ohio State is a public university with a very large student population. This isn't the only ranking where the school placed. It's also #1 in quality for doctor's degrees in plant pathology/phytopathology in Ohio. More information about a doctorate in plant pathology/phytopathology from Ohio State University - Main Campus