Informational table showing disease name, symptoms, pathogen/cause, and management of Leucothoe diseases. Disease Symptoms Pathogen/Cause Management Cylindrocladium leaf spot Dark spots form on leaves. Lesions on stems can girdle and kill them. Cylindrocladium Avoid overhead irrigation. Apply a fungicide as a drenching spray. Cylindrocladium root rot Plants are stunted. Leaves yellow and wilt as branches die. Many dark-brown to black lesions form on roots, enlarge, and girdle roots. Longitudinal cracks may develop in the stem at the soil line. Cylindrocladium Avoid overhead irrigation. Apply fungicide as a soil drench.