Effective and economic storage of pigeonpea seed in triple layer plastic bags

Vales, M. I.; Rao, G. V.; Sudini, H.; Patil, S. B.; Murdock, Larry L.

doi:10.1016/j.jspr.2014.01.004

Cited by 57 publications

(38 citation statements)

References 16 publications

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“…This was not the case for maize stored in woven bags, especially those infested by the weevil. These results are consistent with the results of other studies focused on PICS bags, which demonstrated better outcomes for grain stored in the triple bags than for grain stored in other ways [10, 11, 16–21]. …”

Section: Discussionsupporting

confidence: 92%

“…PICS bags had higher internal R.H. and maintained grain moisture better than woven bags, in which the grain dried out as ambient R.H. dropped over the 8 month storage period. This is consistent with previous observations showing the PICS bags have a more stable R.H. environment than other bag types [7, 21]. A stable moisture environment is beneficial from a farmer’s perspective, as it creates an expectation that initial grain moisture conditions will remain the same so long as the bag is closed.…”

Section: Discussionsupporting

confidence: 91%

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Storage of Maize in Purdue Improved Crop Storage (PICS) Bags

2017

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Interest in using hermetic technologies as a pest management solution for stored grain has risen in recent years. One hermetic approach, Purdue Improved Crop Storage (PICS) bags, has proven successful in controlling the postharvest pests of cowpea. This success encouraged farmers to use of PICS bags for storing other crops including maize. To assess whether maize can be safely stored in PICS bags without loss of quality, we carried out laboratory studies of maize grain infested with Sitophilus zeamais (Motshulsky) and stored in PICS triple bags or in woven polypropylene bags. Over an eight month observation period, temperatures in the bags correlated with ambient temperature for all treatments. Relative humidity inside PICS bags remained constant over this period despite the large changes that occurred in the surrounding environment. Relative humidity in the woven bags followed ambient humidity closely. PICS bags containing S. zeamais-infested grain saw a significant decline in oxygen compared to the other treatments. Grain moisture content declined in woven bags, but remained high in PICS bags. Seed germination was not significantly affected over the first six months in all treatments, but declined after eight months of storage when infested grain was held in woven bags. Relative damage was low across treatments and not significantly different between treatments. Overall, maize showed no signs of deterioration in PICS bags versus the woven bags and PICS bags were superior to woven bags in terms of specific metrics of grain quality.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 91%

Storage of Maize in Purdue Improved Crop Storage (PICS) Bags

2017

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“…Control of bruchid reproduction and damage by triple layer (PICS) bags has been reported in several crops in the recent past (Vales et al, 2014;Baoua et al, 2012;Murdock et al, 2012). In our present study, pod damage by bruchids was less in triple layer bags compared to cloth bags under all conditions (Figs.…”

Section: Discussionsupporting

confidence: 57%

“…Cloth bags were selected since they work on the same principle as that of jute/ gunny bags in permitting air exchange with the surrounding environment. Triple-layer bags were carefully inspected for holes and sealing imperfections, to ensure that only good quality bags were used (Vales et al, 2014).…”

Section: Storage Bags and Descriptionmentioning

confidence: 99%

Purdue Improved Crop Storage (PICS) bags for safe storage of groundnuts

Sudini

Rao

Gowda

et al. 2015

Journal of Stored Products Research

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a b s t r a c tGroundnut seeds are prone to quality deterioration and damage due to improper storage. Hermetic storage of pods offers a novel, sustainable and ecologically safe alternative over traditional methods. In this paper, we demonstrate the efficacy of triple-layer "Purdue Improved Crop Storage (PICS)" bags, (that comprises of two inner high density polyethylene bags and one outer woven polypropylene bag), for protecting pods from quality deterioration, damage by bruchids (Caryedon serratus) and aflatoxin contamination (Aspergillus flavus). Custom made triple-layer bags were used and pods (of cv ICGV 91114) were placed @ 2 kg/bag. Over four months of storage under ambient conditions, triple-layer bags supported retention of seed weight, germinability and oil content significantly better than cloth bags. Further, under both natural and artificial infestations with A. flavus, seed aflatoxins levels were lower in PICS bags compared to cloth bags. Toxin accumulation in PICS bags deliberately infested with bruchids and A. flavus was less compared to cloth bags under similar conditions. Bruchid damage to pods was less in PICS bags versus cloth bags in all cases. Our results suggest the superiority of triple-layer PICS bags over cloth bags in protecting seed viability, seed weight and oil content while safeguarding the groundnuts from bruchids and retarding toxin accumulation.

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“…Originally developed to reduce insects damage to stored cowpeas in western and central Africa (Murdock et al., 2012), the bags have been evaluated for other commodities such as maize, groundnut, and pigeon pea (Baoua et al., 2014, Murdock et al., 2012, Sudini et al., 2015, Vales et al., 2014, Williams et al., 2014). Biological activity within the bags, including respiration from the stored products and/or the insects and grain, decreases oxygen and increases carbon dioxide to levels that are insecticidal.…”

Section: Introductionmentioning

confidence: 99%

Impact of opening hermetic storage bags on grain quality, fungal growth and aflatoxin accumulation

Tubbs

Baributsa

Woloshuk

2016

Journal of Stored Products Research

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Purdue Improved Crop Storage (PICS) bags are used by farmers in Sub-Saharan Africa for pest management of stored grains and products, including maize. These bags hermetically seal the products, preventing exchange with external moisture and gases. Biological respiration within the bags create an environment that is unsuitable for insect development and fungal growth. This study was conducted to determine the impact of routine opening of the storage bags for maize consumption on fungal growth and aflatoxin contamination. Maize with moisture contents (MC) high enough to support fungal growth (15%, 16%, 18% and 20%) was stored in PICS bags, which were opened weekly and exposed to humid conditions (85% RH) for 30 min over a period of 8 weeks and 24 weeks. Monitors indicated that oxygen defused into the open bags but did not reach equilibrium with the bottom layers of grain during the 30-min exposure period. Fungal colony forming units obtained from the grain surface increased 3-fold (at 15% MC) to 10,000-fold (at 20% MC) after 8 weeks. At both 8 weeks and 24 weeks, aflatoxin was detected in at least one bag at each grain moisture, suggesting that aflatoxin contamination spread from a planted source of A. flavus-colonized grain to non-inoculated grain. The results indicate that repeatedly breaking the hermetic seal of the PICS bags will increase fungal growth and the risk of aflatoxin contamination, especially in maize stored at high moisture content. This work also further demonstrates that maize should be properly dried prior to storage in PICS bags.

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Effective and economic storage of pigeonpea seed in triple layer plastic bags

Cited by 57 publications

References 16 publications

Storage of Maize in Purdue Improved Crop Storage (PICS) Bags

Storage of Maize in Purdue Improved Crop Storage (PICS) Bags

Purdue Improved Crop Storage (PICS) bags for safe storage of groundnuts

Impact of opening hermetic storage bags on grain quality, fungal growth and aflatoxin accumulation

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