A method for determining tolerance of cassava genotypes to African cassava mosaic disease in the screenhouse

Abstract

An investigation was conducted into the primary incidence and severity of the African cassava mosaic disease (ACMD) in four exotic cassava cultivars TMS 4(2)1425, TMS 30572, TMS 50395, and TMS 91934 at Fumesua. TMS 4(2)1425, TMS 50395, and TMS 30572 showed tolerance to ACMD by expressing low primary incidence and severity, while TMS 91934 and 'Ankra' were susceptible to ACMD by showing a relatively high primary incidence and severity. It was also observed that temperature variations had an effect on virus expression of cassava seedlings in the screenhouse. The methodology developed for this screenhouse study could be a useful tool in determining tolerance of cassava genotypes to ACMD in Ghana.