“…1) are both located on a geographical line running East-West in Burkina Faso, approximately 30 Km south of the capital Ouagadougou; whereas most of the other villages, of which several showed over all negative results (Bani, You, Kindi, Zorgho), are located north of this line. Since the effect of E. alba extract in both villages (Diapangou and Ipendo) appeared to be positive and robust (20-40% yield increase, 17 and 24 field tests respectively, Fig.1), it could make sense to focus solely on the plant extract since the pesticide, Calthio C, is toxic to humans (Cereser et al, 2001;Pino et al, 2015) and protective measures for farmers using this agent in Burkina Faso are insufficient (Toe et al, 2013). In addition, the plant, E. alba, can easily be found near the two villages Diapangou and Ipendo (Zida et al, unpublished results).…”