Planting date in South Kivu, eastern DR Congo: A real challenge for the sustainable management of Spodoptera frugiperda (Lepidoptera: Noctuidae) by smallholder farmers - Marcellin Cuma Cokola; Grégoire Noël; Yannick Mugumaarhahama; Rudy Caparros Megido; Espoir B. Bisimwa; Frédéric Francis (PLoS ONE)