The major source of inoculum for greasy spot are wind-dispersed sexual spores ( ascospores) produced during periods of wetness on decomposing fallen leaves. The disease cycle of this pathogen is unusual because most of the infection occurs on mature leaves. In areas with high temperature and high rainfall the disease cycle continues year round and infection may occur at any time.

Other Common Names

Greasy spot rind blotch

Serrano, D., Serrano, E., Dewdney, M., and Southwick, C. (2010). Citrus Diseases. USDA/APHIS/PPQ Center for Plant Health Science and Technology. [09-14]