Maize needs to be stored using effective and safe postharvest management measures to prevent physical insect damage as well as ensure stability of nutritional quality during storage. In this study, conducted in February–December 2016, insect pest management bmethods for bagged maize preservation in storehouses located in markets in Nigeria were evaluated for their ability to preserve nutritional quality. Study locations were in three grain markets, namely Eleekara market in Oyo town and Arisekola market in Ibadan, Oyo State, South West Nigeria, and Ago market in Ilorin, Kwara State, North Central Nigeria. Treatments comprised Piper guineense (Botanical), Bularafa diatomaceous earth (DE), permethrin powder (Rambo™) (Permethrin), PICS bags (hermetic) and ZeroFly® bags (non-hermetic). The study also had negative control (Control) comprising untreated maize in polypropylene bags. In general, as a result of insect infestation, protein content increased in all treatments except PICS which had the least infestation. After 11 months of storage, Permethrin and PICS treatments had the lowest insect infestation levels and the highest energy levels. Energy level in the Botanical treatment was also high and similar to levels in Permethrin and PICS treatments most likely due to fats and essential oils in P. guineense being adsorbed and/or absorbed by kernels. Fat content was lower in the Control and DE treatments likely due to the Control having the highest insect infestation and the DE adsorbing and/or absorbing fat from kernels. During storage carbohydrate content decreased in all treatments except the Control. However, even in the Control, there was a clear trend of decrease in carbohydrate content. Because the Control had the highest insect (Sitophilus zeamais) infestation and insect damaged kernels (IDK), this trend in decrease in carbohydrate content may be insect related. Ash content increased in the ZeroFly treatment, was unchanged in Botanical, Control, and PICS treatments, and decreased in DE and Permethrin treatments. Nutritional quality variables in this study were within or close to the known value ranges for maize. Therefore, use of maize that had been fumigated well and had a relatively low initial grain MC (9.1%), in addition to the effects of the treatments most likely slowed down population growth of the several insect species that were found and contributed to preserving nutritional quality. The relatively low insect populations in all treatments, including the Control, during the February–September period probably reduced the clarity of effects of infestation on nutritional composition reported in this study.
|Number of pages||17|
|Journal||African Journal of Food, Agriculture, Nutrition and Development|
|State||Published - 2021|
Bibliographical noteFunding Information:
We htnahekps orsot of tnhis spect, TrheonUjteditat esSgAny for Intec ernational Development(USAID), United StateseDpartmentof Agriculture-Foreign Agricultural Service (USDA/FAS), and for thedainimstrativeusprepopodlrdreot hbvSUeDyiA-t FAS. Wehtnakichae lM.A modaOrafor technicaluspnapvdeowii nrrngtearl i er ea draftof thisamnuscript. Funding for thissrearceh was provided through theSUDA-FAS under aocraotivepgaemreneiwtth theUniversity of Ibadan (Agreement# 58-3148-6-062), Nigerian Stored Products Research Institute, NSPRI (Agreement# 58-3148-6-061), OklahomatSatenUversiity (Agreement# TA-CR-15-025), University of Kentucky (Agreement# TA-CR-15-002), andPurduenUversiity (Agreement# TA-CR-15-027). Mention of trade names or commercial products nihis tpublication is osely l for the purpose of providing specific ni fation aond doerms nmipoy relctommendation or endorsementby theSUAID, USDA-FAS, Nigerian Stored Products Research Institute, University of Ibadan, OklahomatSatenUversiity, PurduenUversiity, and University of Kentucky.
We thank the sponsors of this project, The United States Agency for International Development (USAID), United States Department of Agriculture-Foreign Agricultural Service (USDA/FAS), and for the administrative support role provided by the USDAFAS. We thank Michael A. Omodara for technical support and reviewing an earlier draft of this manuscript. Funding for this research was provided through the USDAFAS under a cooperative agreement with the University of Ibadan (Agreement# 58-3148-6-062), Nigerian Stored Products Research Institute, NSPRI (Agreement# 58-3148-6-061), Oklahoma State University (Agreement# TA-CR-15-025), University of Kentucky (Agreement# TA-CR-15-002), and Purdue University (Agreement# TA-CR-15-027). Mention of trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the USAID, USDA-FAS, Nigerian Stored Products Research Institute, University of Ibadan, Oklahoma State University, Purdue University, and University of Kentucky.
© 2021. African Journal of Food, Agriculture, Nutrition and Development. All Rights Reserved.
- hermetic storage
- maize quality
- nutritional quality
- Reduced-risk pest management
ASJC Scopus subject areas
- Food Science
- Agricultural and Biological Sciences (miscellaneous)