The cassava mosaic virus disease is an important cassava disease which causes low yields. It can be recognised on the cassava leaves which have spots ranging from light green to yellow. The disease is given to the plant by the whitefly. This disease cannot be cured but it can be avoided. To prevent the cassava mosaic virus disease we must use cuttings which have not been attacked by the disease. Most of all, we must plant varieties which are resistant to the disease.