Utah State University Extension
This guide provides a list of vegetable crop diseases that have been documented in Utah along with some that are likely to occur. Plant diseases are caused by pathogens such as fungi, bacteria, viruses, and fungal-like organisms. Diagnosing specific plant diseases takes careful observation of signs, symptoms, and sometimes culturing and molecular testing in a laboratory setting.
Nischwitz, Claudia; Murray, Mair; and Volesky, Nick, "Vegetable Diseases of Utah" (2021). All Current Publications. Paper 2163.