Impact of storage environment on the efficacy of hermetic storage bags

Lane, Brett; Woloshuk, Charles P.

doi:10.1016/j.jspr.2017.03.008

Cited by 50 publications

(37 citation statements)

References 39 publications

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“…Similarly, Data logger placed inside the hermetic bags-PICS and woven polypropylene bag did not get fluctuate on its internal environmental profiles in two different locations and found no penetration of moisture too. (Lane & Woloshuk, 2017). …”

Section: Journal Of Maize Research and Developmentmentioning

confidence: 99%

Effects of storage structures and moisture contents on seed quality attributes of quality protein maize

Bhandari

Ghimire

Kaduwal

et al. 2018

J. Maize Res. & Dev.

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The study was aimed to examine the effects of various storage structures and moisture contents on seed quality attributes of quality protein maize seed. The quality protein maize (QPM-1) seed was tested in conventional seed storage containers (Fertilizer sack and earthen pot) and the improved hermetic ones (Metal bin, Super grain bag, and Purdue Improved Crop Storage (PICS) bag) at Seed Science and Technology Division, Khumaltar, Nepal during February, 2015 to January 2016. Ten treatments comprising 5 storage devices in two moisture regimes (11% and 9%) replicated thrice and laid out in Completely Randomized Design (CRD). Data on temperature, relative humidity (RH), germination, electrical conductivity (EC), seed moisture content (MC) were collected bimonthly. The conventional containers were found liable to the external environmental condition whereas the hermetic structures observed with controlled RH level below 40% in all combinations. Electrical conductivity (EC) for seed vigor showed that hermetic containers provide higher seed vigor than the conventional ones. Up to 4 months all treatments were found statistically at par for germination. A significant difference was observed in each treatment after 4 months where PICS bag & Super grain bag showed best germination followed by metal bin while fertilizer bag & earthen-pot showed poorer and poorest germination respectively till one year. Almost all treatments with lower MC showed better results than the treatments with higher MC. A negative correlation (R 2 =69.7%) was found between EC and Germination. All six figures from 2 to 12 months on MC showed statistically different where hermetic plastic bags were found maintaining MC as initial whereas MC of fertilizer bags and earthen pot was spiked than the basal figure. The finding evidenced that the hermetic containers and low MC are the seed storage approaches for retaining the quality of seed even in an ambient environmental condition for more than a year.Keywords: Seed quality, Germination, storage containers, Electrical conductivity, Moisture content 78 INTRODUCTIONMaize (Zea mays L.) is the second most important staple food crop after rice and a major feed crop in Nepal (KC et al., 2015). Despite the implementation of various seed related projects and active involvement of public and private institutions; still the country has been suffering from unavailability of quality seeds. Quality seed demand in Nepal is apparently tremendous, where lion's share of seeds are imported and country's import has been hiking each year. The official record of Seed Quality Control Centre (SQCC) in 2015 shows that 2745 metric tons of seed was traded in where 1025 million of Nepalese currency redeemed. Formal sector contributes less than 10% of seed demand whereas Informal sector, farmer-to-farmer seed exchange mechanism has been contributing 20-50% of seed demand. Seed replacement rate (SRR) for maize is below 15 % (Joshi, 2015). Hence, production and proper storage of quality seed in community level is regarded as p...

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Section: Journal Of Maize Research and Developmentmentioning

confidence: 99%

Effects of storage structures and moisture contents on seed quality attributes of quality protein maize

Bhandari

Ghimire

Kaduwal

et al. 2018

J. Maize Res. & Dev.

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“…The current study stems from two previous studies in the United States and Kenya that examine the efficacy of storing maize in hermetic bags to reduce the risk of mycotoxin accumulation during storage. In both studies, maize was sealed in hermetic and woven bags and stored for 3 months at three locations, Indiana and Arkansas, United States, and Makueni County, Kenya ( Maina et al, 2016 , 2017 ; Lane and Woloshuk, 2017 ). Maize stored in the United States was harvested from a single source, while in Kenya individual farmers grew, dried and stored the maize at their farms.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Fungal Microbiome of Maize During Hermetic Storage in the United States and Kenya

et al. 2018

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Prior to harvest, maize kernels are invaded by a diverse population of fungal organisms that comprise the microbiome of the grain mass. Poor post-harvest practices and improper drying can lead to the growth of mycotoxigenic storage fungi and deterioration of grain quality. Hermetic storage bags are a low-cost technology for the preservation of grain during storage, which has seen significant adoption in many regions of Sub-Saharan Africa. This study explored the use of high-throughput DNA sequencing of the fungal Internal Transcribed Spacer 2 (ITS2) region for characterization of the fungal microbiome before and after 3 months of storage in hermetic and non-hermetic (woven) bags in the United States and Kenya. Analysis of 1,377,221 and 3,633,944 ITS2 sequences from the United States and Kenya, respectively, resulted in 251 and 164 operational taxonomic units (OTUs). Taxonomic assignment of these OTUs revealed 63 and 34 fungal genera in the US and Kenya samples, respectively, many of which were not detected by traditional plating methods. The most abundant genus was Fusarium, which was identified in all samples. Storage fungi were detected in the grain mass prior to the storage experiments and increased in relative abundance within the woven bags. The results also indicate that storage location had no effect on the fungal microbiome of grain stored in the United States, while storage bag type led to significant changes in fungal composition. The fungal microbiome of the Kenya grain also underwent significant changes in composition during storage and fungal diversity increased during storage regardless of bag type. Our results indicated that extraction of DNA from ground kernels is sufficient for identifying the fungi associated with the maize. The results also indicated that bag type was the most important factor influencing changes in fungal microbiome during storage. The results also support the recommended use of hermetic storage for reducing food safety risks, especially from mycotoxigenic fungi.

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“…Temperature and relative humidity showed an increasing trend in all storage rooms from the start to the end of storage period. Although the optimum conditions for fungal spore germination and proliferation are different from those for mycotoxin production, temperature (15.8–34.9°C) and humidity (34.2%–89.7%) ranges in the study sites were in the intervals reported as suitable for both microbial growth (Choi et al, ; Garbaba, Diriba, Ocho, & Hensel, ; Lane & Woloshuk, ) and mycotoxin production (Choi et al, ; Lane & Woloshuk, ; Murphy, Hendrich, Landgren, & Bryant, ) in cereals including rice. The optimum temperature for the growth of Aspergillus spp.…”

Section: Resultsmentioning

confidence: 97%

Mycotoxin concentrations in rice from three climatic locations in Africa as affected by grain quality, production site, and storage duration

Tang

Ndindeng

Bigoga

et al. 2019

Food Science & Nutrition

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Information on the mycotoxin contamination of rice in Africa is limited although the risk of contamination is high. In this study, domestic milled rice processed by actors using suboptimal methods was purchased and total fumonisin (FUM), zearalenone, and aflatoxin concentrations determined at 0, 90, and 180 days after storage. Three different climatic locations, Cotonou (Benin) in the Guinea savanna, Yaoundé (Cameroon) in the Tropical forest, and N'diaye (Senegal) in the Sahel, were selected as storage sites. Subsets of the samples collected from Glazoue (Benin), Ndop (Cameroon), and Dagana (Senegal) were stored in plastic woven bags under room conditions in the respective sites with or without calcium oxide (burnt scallop shell—BSS, 0.1% w/w) treatment. Multivariance analysis showed that FUM concentration was positively influenced by the duration of storage only while zearalenone concentration was negatively influenced by relative humidity and head rice but positively by impurities. Zearalenone concentration was also influenced by sample collection/storage location, processing type, and duration of storage. Aflatoxin concentration was influenced negatively by storage room temperature and head rice but positively by impurities and chalky grains. In addition, aflatoxin concentration was influenced by collection/storage location and processing type. BSS treatment followed by storage for 6 months had no effect on the concentration of the three assessed mycotoxins. Strategies to reduce the risk of mycotoxin contamination in study sites will include the improvement of physical rice quality through better pre‐ and postharvest practices and proper packaging of both treated rice and untreated rice in hermetic systems before marketing and storage.

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Impact of storage environment on the efficacy of hermetic storage bags

Cited by 50 publications

References 39 publications

Effects of storage structures and moisture contents on seed quality attributes of quality protein maize

Effects of storage structures and moisture contents on seed quality attributes of quality protein maize

Changes in the Fungal Microbiome of Maize During Hermetic Storage in the United States and Kenya

Mycotoxin concentrations in rice from three climatic locations in Africa as affected by grain quality, production site, and storage duration

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