Cylindrocladium scoparium Morgan was isolated from diseased stem parts of Cuphea hyssopifolia cuttings, which were rooting on greenhouse benches. In the laboratory trial, the species colonized leaf blades as well as stem parts and roots with a significantly quicker spread of necroses on cv. Violet than on cvs. White and Rose. In the greenhouse trial, yellowing and dying of cuphea leaves was observed already after 7 days of rooting the cuttings in substratum infested by C. scoparium . After 2 weeks, all cuttings that were rooting in noninfested substratum produced roots, and no symptoms were observed on leaves. On plants growing in substratum infested with the tested species, yellowing, dying of leaf blades and only rooting of 1/5 of the cuttings was observed on cv. Violet, whereas cvs. White and Rose were less susceptible