Abstract
During storage, cereals and legumes are vulnerable to insects, rodents, and fungi, which can cause loss of weight, damage or discoloration of products, and/or toxin formation. Hermetic bags can prevent excessive insect infestation, and toxin formation. This paper presents an analysis of the effects of hermetic bags for the storage of maize on food loss reduction by insects and on net greenhouse gas (GHG) emissions, based on practical data from field trials. Their economic feasibility, by optimizing the total income in markets with different price seasonalities in different Sub-Saharan African countries, is analyzed. The data of five field trials were combined and put in classes of 50 days of increasing storage time to get a realistic loss of produce during storage using regular bags (with or without the use of pesticides) and hermetic bags. The maize for storage trials were used as is, bought locally or used direct from the field. Scenario studies with standard storage, standard storage combined with pesticides and hermetic bag storage show significant losses by insects after 100 storage days for standard and standard with pesticides storage, whereas with hermetic bags, product losses are kept to a minimum of 2%. The economic analysis shows less clear-cut outcomes: the interventions' effectiveness depends largely on the rate of seasonal price fluctuation of the commodity. For farmers' personal consumption, when the quality is less critical, the use of hermetic bags is only more economical compared with other methods of storage for produce kept over 100 days. Since the quality of maize is well-preserved by the hermetic bag, the return on the investment is shorter when the maize is sold at the market. However, for countries with a low seasonal price gap, the investment cannot be recouped. As the use of hermetic bags is a good intervention for preventing food loss, it is best promoted not only for providing direct profits to farmers but also for health benefits, as bag use implies a lower need for pesticides and a possible reduction in aflatoxin intake.
Highlights
Post-harvest losses (PHL) of dry food crops are a large problem in the Sub-Saharan region, especially for smallholder farmers
The average weight loss of the hermetic bag was lower for both the normal bag and the use of pesticides after a storage period of 49 days, data points below the average of the hermetic bag in the same period can still be found, in 6% and 41% for resp. the normal bag and the use of pesticides
From the perspectives of food security and greenhouse gas emissions, use of hermetic bags for maize storage in SubSaharan Africa works out positively compared with standard bags or standard bags combined with a pesticide
Summary
Post-harvest losses (PHL) of dry food crops are a large problem in the Sub-Saharan region, especially for smallholder farmers. More than 500 million smallholder farmers grow crops on
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have