Summary The rapid spread of the invasive crop pest, the fall armyworm (Spodoptera frugiperda), across Africa in recent years has attracted considerable interest, especially the effect on maize farmers. The purpose of this study is to understandandassess the economic costs of the fall armyworm invasionin Ghana under different control scenarios. Three different scenarios are modelled: one with no farmer applied control measures, one with limited control measures and one with proactive control...
