Symptoms include tan spots that develop purple rims. Leaves may also have necrotic veins and leaf margins, and large necrotic blotches. In some cases shot holes appear. Premature abscision of leaves infected in the spring is characteristic of the disease on C. nuttallii . On both hosts, leaves that are entirely blighted do not abscise in the fall.
Infections often progress down the petioles of blighted leaves into shoots, resulting in cankers.
Non-abscised blighted leaves. Twigs Direct infection of shoots, resulting in tiny cankers, may occur on C. florida during spring and fall. Girdling cankers typically develop at leaf nodes, causing twig dieback. On C. nuttallii , fall blighting of terminal leaves is common, resulting in death of terminal buds. This reduces spring budbreak and causes C. nuttallii to refoliate via axial buds in midsummer.