A harmful disease of the African violet — late blight rot of leaves (pathogen — Phytophthora sp.). is revealed in private collections of Donetsk florists. Agrotechnical and chemical control measures are described, which made it possible to suspend the development of the disease. The fungicide Ridomil Gold (mancozeb + mefenoxam) with soil application in a concentration of 0.25% demonstrated phytotoxicity.