The disease form dark patches on leaves which are made of hyphae and spores of several saprophytic fungal organisms.
The fungi utilizes the honeydew secretions from aphids, whiteflies, mealybug and other insects that feeds on the leaves.
Fungal causal agents: Fungi in the genera Capnodium, Chaetothyrium, Metacapnodium, and Sorias
SOOTY MOLD
Crapemyrtle diseases