Pseudocercospora angolensis is a fungus that requires moisture for infection and the production of wind-borne conidia. Other than by wind, conidia can be transported on infected fruit or propagative material. Local dispersal is primarily by rain-splash or raindrops. Humans mediate in the dissemination of the fungus through transport of infected plant material and/or fruits from infected areas. Because leaf lesions produce more conidia than similar lesions on fruit, it is more likely that they constitute the main source of infection during disease spread in infected areas.
The fungus probably survives in dormant lesions on infected material until the onset of conditions is conducive to sporulation.
The disease is favored by prolonged wet weather that stimulates the production of new susceptible flush. Lesions produced the previous season can begin to sporulate within two weeks of the beginning of the rainy season, at most temperatures in the tropics, and those spores infect the new tissue.
Other Common Names
Phaeoramularia fruit and leaf spot (PFLS), Angular leaf spot of Citrus
Serrano, D., Serrano, E., Dewdney, M., and Southwick, C. (2010). Citrus Diseases. USDA/APHIS/PPQ Center for Plant Health Science and Technology. [09-14]