Cassava Brown Streak Disease is a major viral disease of Cassava in East and Central Africa. It causes necrosis in tubers rendering them unpalatable and thus a threat to cassava production. The disease is spread by whiteflies and through planting infected plant materials. Currently no resistant variety has been bred. One of the most viable method for the control of the disease is through cultural methods. This book contributes immense Knowledge on the epidemiology of the disease in Western Kenya. It informs the reader the areas in Western Kenya where the disease is prevalent and the cassava varieties more susceptible to the disease. The book is particularly useful to plant pathologists, plant breeders and policy makers.