Use one of the dithiocarbamates at the first indication of die back of the tip growth. It is a fast growing plant, cold hardy, and does well in full sun or partial shade. The fungus causes angular to irregular reddish or grayish brown areas in the leaf. The result of the fungus is excessive leaf drop usually in the spring. It can be controlled with Dithane or daconil.
Control is easier if fungicides are applied when the first spots are noticed.
Nandina domestica or common nandina is widely grown as a foundation plant. The plant is cold hardy and very popular in the temperate climate although it flourishes in Florida. There are several viruses that attack nandina and the various cultivars. The symptoms are generally expressed in the leaves. Infected plants are obviously stunted with inward curling of leaves that may be a reddish color and narrow.