Technical Abstract: African violet cultivars have had severe leaf spot epidemics caused by Corynespora cassiicola in recent years. Unfortunately, little information has been published on the relationship between African violets and C. cassiicola. Mist, drip, and ebb and flow irrigation systems were studied to determine which was most effective in reducing the spread of the fungus. Data indicated that the drip treatment supported a slower initial infection rate. Lesions on plants did not appear until the fifth week. However once infection was present, all three systems provided no reduction in the spread of the pathogen. The results show that all irrigation systems contribute favorable moisture conditions for the disease in a greenhouse and fungicide treatment will be important to achieve healthy plants.