Background and Objective: Since its introduction in Côte d'Ivoire in the 1980s, Cassava Mosaic Disease has so far continued to cause damage to cassava production in the country. This study aimed to characterize cassava mosaic diseaseʼs pathogens and emphasize current concerns in three major cassava-producing regions for better disease control. Materials and Methods: Two hundred cassava leaf samples comprising symptomatic infection and healthy characteristics from improved and traditional varieties were collected in the departments of Bouaké, Yamoussoukro and Daloa from 2019-2020 in rainy and dry seasons. These leaves were subjected to molecular analyses. Cassava Mosaic Diseaseʼs prevalence and severity were evaluated. All data were analyzed with software R, version 3.3.1. Results: Cassava Mosaic Disease overall phenotypic prevalence was 43.37% and almost equally distributed in all investigated departments. After the molecular diagnostic, the infection rate reached 77.7% for symptomatic plants and 34.28% for asymptomatic plants. The severity scores in traditional and improved varieties were S2, S3 and S4 but S2 were the most frequent. ACMV strains were the most detected while EACMV and co-infections showed the highest injury. Conclusion: The Cassava Mosaic Viruses largely present in all surveyed regions. Traditional varieties seem to be more resistant to infections and therefore require particular attention for virusesʼ control.

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