Other cultural practices such as removing mummified berries and dead branches have also been shown to reduce disease incidence of CBD.
Twig-bark as well as mummified berries has been considered to be the primary source of inoculum; however, active berry lesions soon take over as the primary source, producing far more acervuli with greater amount of spores.
Temperatures must be at approximately 23 degrees Celsius; however, what is most important is the length of time that surfaces remain moist.
Water is a necessity throughout all stages of the disease cycle, so much so that it only occurs during the rainy season.
Coffee Berry Disease is a polycyclic disease which is primarily spread by falling rain droplets hitting acervuli on the diseased host organs. This allow the conidia to disperse and adhere to other susceptible organs; although, in some rare cases it may be carried by birds or other vectors.
Scab lesions have been noted to become active again under conducive conditions.
From crop loss and preventative care, there is an estimated $300-500 million dollar cost.
Severe epidemics have been reported to cause up to 50-80% loss of berries.
The sole host of C. kahawae is Coffea arabica, and it restricted to only countries in Africa. It was first reported in Western Kenya in 1922, but has since been reported in all major C. arabica growing countries in Africa including Ethiopia, Zambia, and Cameroon.
Coffee Berry Disease (CBD) is an anthracnose of the young green expanding berries, ripening berries, flowers, seed hypocotyls, and branches of Coffea arabica, caused by the ascomycetous fungi Colletotrichum kahawae.