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Performance of PICS bags under extreme conditions in the sahel zone of Niger

Experiments in Niger assessed whether extreme environmental conditions including sunlight exposure affect the performance of triple-layer PICS bags in protecting cowpea grain against bruchids. Sets of PICS bags and woven polypropylene bags as controls containing 50 kg of naturally infested cowpea gr...

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Autores principales: Baoua, Ibrahim B., Bakoye, Ousmane, Amadou, Laouali, Murdock, Larry L., Baributsa, Dieudonne
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5849789/
https://www.ncbi.nlm.nih.gov/pubmed/29551838
http://dx.doi.org/10.1016/j.jspr.2018.01.007
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author Baoua, Ibrahim B.
Bakoye, Ousmane
Amadou, Laouali
Murdock, Larry L.
Baributsa, Dieudonne
author_facet Baoua, Ibrahim B.
Bakoye, Ousmane
Amadou, Laouali
Murdock, Larry L.
Baributsa, Dieudonne
author_sort Baoua, Ibrahim B.
collection PubMed
description Experiments in Niger assessed whether extreme environmental conditions including sunlight exposure affect the performance of triple-layer PICS bags in protecting cowpea grain against bruchids. Sets of PICS bags and woven polypropylene bags as controls containing 50 kg of naturally infested cowpea grain were held in the laboratory or outside with sun exposure for four and one-half months. PICS bags held either inside or outside exhibited no significant increase in insect damage and no loss in weight after 4.5 months of storage compared to the initial values. By contrast, woven bags stored inside or outside side by side with PICS bags showed several-fold increases in insects present in or on the grain and significant losses in grain weight. Grain stored inside in PICS bags showed no reduction in germination versus the initial value but there was a small but significant drop in germination of grain in PICS bags held outside (7.6%). Germination rates dropped substantially more in grain stored in woven bags inside (16.1%) and still more in woven bags stored outside (60%). PICS bags held inside and outside retained their ability to maintain internal reduced levels of oxygen and elevated levels of carbon dioxide. Exposure to extreme environmental conditions degraded the external polypropylene outer layer of the PICS triple-layer bag. Even so, the internal layers of polyethylene were more slowly degraded. The effects of exposure to sunlight, temperature and humidity variation within the sealed bags are described.
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spelling pubmed-58497892018-03-16 Performance of PICS bags under extreme conditions in the sahel zone of Niger Baoua, Ibrahim B. Bakoye, Ousmane Amadou, Laouali Murdock, Larry L. Baributsa, Dieudonne J Stored Prod Res Article Experiments in Niger assessed whether extreme environmental conditions including sunlight exposure affect the performance of triple-layer PICS bags in protecting cowpea grain against bruchids. Sets of PICS bags and woven polypropylene bags as controls containing 50 kg of naturally infested cowpea grain were held in the laboratory or outside with sun exposure for four and one-half months. PICS bags held either inside or outside exhibited no significant increase in insect damage and no loss in weight after 4.5 months of storage compared to the initial values. By contrast, woven bags stored inside or outside side by side with PICS bags showed several-fold increases in insects present in or on the grain and significant losses in grain weight. Grain stored inside in PICS bags showed no reduction in germination versus the initial value but there was a small but significant drop in germination of grain in PICS bags held outside (7.6%). Germination rates dropped substantially more in grain stored in woven bags inside (16.1%) and still more in woven bags stored outside (60%). PICS bags held inside and outside retained their ability to maintain internal reduced levels of oxygen and elevated levels of carbon dioxide. Exposure to extreme environmental conditions degraded the external polypropylene outer layer of the PICS triple-layer bag. Even so, the internal layers of polyethylene were more slowly degraded. The effects of exposure to sunlight, temperature and humidity variation within the sealed bags are described. Elsevier 2018-03 /pmc/articles/PMC5849789/ /pubmed/29551838 http://dx.doi.org/10.1016/j.jspr.2018.01.007 Text en © 2018 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Baoua, Ibrahim B.
Bakoye, Ousmane
Amadou, Laouali
Murdock, Larry L.
Baributsa, Dieudonne
Performance of PICS bags under extreme conditions in the sahel zone of Niger
title Performance of PICS bags under extreme conditions in the sahel zone of Niger
title_full Performance of PICS bags under extreme conditions in the sahel zone of Niger
title_fullStr Performance of PICS bags under extreme conditions in the sahel zone of Niger
title_full_unstemmed Performance of PICS bags under extreme conditions in the sahel zone of Niger
title_short Performance of PICS bags under extreme conditions in the sahel zone of Niger
title_sort performance of pics bags under extreme conditions in the sahel zone of niger
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5849789/
https://www.ncbi.nlm.nih.gov/pubmed/29551838
http://dx.doi.org/10.1016/j.jspr.2018.01.007
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