Fig. 3From: Assessment of the optimal frequency of insecticide sprays required to manage fall armyworm (Spodoptera frugiperda J.E Smith) in maize (Zea mays L.) in northern GhanaEffect of spraying regimes on proportion of damaged cobs and grain yield in 2019 and 2020 season. Data are means ± standard error of means (SEM). Bars followed by different letters are significantly different at 5% probability threshold. A Proportion of damaged cobs in 2019 season; B proportion of damaged cobs in 2020 season; C grain yield in 2019 season; D grain yield in 2020 seasonBack to article page