Presence of Guignardia citricarpa confirmed in Uganda
In November 2006, orange fruits (Citrus sinensis) showing black spot symptoms were observed in the eastern part of Uganda (Teso sub-region). Small lesions (4-5 mm) with light centres, surrounded by a darker red to purple rim were observed on the surface of the fruit. Within the lesions, numerous dark black fruiting bodies were seen. Studies (morphology, real-time PCR) carried out by different laboratories in the United Kingdom (Global Plant Clinic, CABI, Central Science Laboratory) confirmed the presence of Guignardia citricarpa (EPPO A1 List) on the diseased fruits. There had been earlier records of citrus black spot in Uganda but this is the first confirmed report of G. citricarpa in this country.
The situation of Guignardia citricarpa in Uganda can be described as follows: Present, observed on Citrus sinensis fruits in the eastern part (Teso sub-region) and confirmed in 2008.
Reeder R, Kelly PL, Harling R (2008) First confirmed report of citrus black spot caused by Guignardia citricarpa on sweet oranges (Citrus sinensis) in Uganda. New Disease Reports, Volume 17, February 2008 - July 2008. http://www.bspp.org.uk/ndr/july2008/2008-38.asp