“…Furthermore, in order to reflect common bean growing practices in Tanzania, half of the farmers 20planted beans as a mono-crop whilst the other half (20) planted beans as an intercrop with maize (Zea mays). These six species were chosen due to their wide abundance around farms, roadsides and bushland, their familiarity to farmers and considerable existing knowledge on their efficacy, bioactive constituents and safety (Adedire and Akinneye, 2004;Adeniyi et al, 2010;Ambrósio et al, 2008;Asawalam et al, 2008;Bagnarello et al, 2009;Belmain et al, 2012;Gadzirayi et al, 2009;Ganjian et al, 1983;Gu et al, 2002;Kawuki et al, 2005;Madzimure et al, 2011;Mujovo et al, 2008;Oyewole et al, 2008;Pereira et al, 1997;Stevenson et al, 2012;Viljoen et al, 2005). To ensure uniformity, the leaves from each seasonal collection were mixed together for each species before drying.…”