Over the past decade, the application of hermetic storage bags has been promoted in the Sub-Sahara region for the storage of maize and other vulnerable crops (Baoua et al., 2014, De Groote et al., 2013). The bags are made of plastic with low permeability to atmospheric gases. Respiration by the grain, insects, and fungi lead to a reduction in oxygen and an increase in carbon dioxide within the hermetic bag (Murdock et al., 2012). Within a short period of time, conditions become inhibitory to insect and fungal growth and development. Although these bags cost significantly more than the traditional woven bags, the need for insecticide applications is eliminated.