Abstract
Musa landraces (469) from 73 villages in 10 states in 1999, 2000 and 2004 in southern Nigeria were visually assessed to determine virus symptoms associated with CMV disease. CMV indexing was done using dot-blot immunoassay and ELISA. Monoclonal antibodies were used to group CMV isolates in 2004. Symptoms of interveinal chlorosis and chlorotic streaks were observed in 22.4 and 17.9% of the Musa samples with CMV disease incidences of 17.1% and 14.7%, respectively. Other virus symptoms accounted for between 1.5 and 12.2% of the total leaf samples while 13.9% were asymptomatic. CMV incidence in asymptomatic leaf samples was as high as 10.4% while the virus incidence in the other symptom types were between 0.9 and 7.9%. The incidences of CMV in both the symptomatic and asymptomatic plants in 1999, 2000 and 2004 were between 1.3 and 18.7%, 1.9 and 26.9% and 4.9 and 26.4%, respectively.
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