Characterization of volatile organic compounds released by granivorous insects in stored wheat

Senthilkumar, T.; Jayas, Digvir S.; White, N. D. G.; Freund, Michael S.; Shafai, Cyrus; Thomson, D. J.

doi:10.1016/j.jspr.2011.09.006

Cited by 27 publications

(17 citation statements)

References 12 publications

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“…of pairs (insect density) of T. castaneum at the three storage periods. Senthilkumar et al [22] found that the amount of volatiles produced by T. castaneum adults in wheat flour samples were a direct relationship which increased with an increase in insect density. The concentration of MBQ, EBQ and 1 tridecene released by ten adult insect were: 8.5, 9.1 and 10.6 µg/100 µl compared to 7, 8 and 4.2 µg/100µl for five adult insects after 72h storage period.…”

Section: Relationship Between Insect Density Of T Castaneum and Levementioning

confidence: 99%

Impact of Insect Densities Tribolium Castaneum on the Benzoquinone Secretions and Aflatoxins Levels in Wheat Flour During Storage Periods

El-Desouky¹,

El-Badawy²,

Hussain³

et al. 2018

TOBIOTJ

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Objectives: The present study was prepared to investigate the impact of insect density, adult emergence of Tribolium castaneum on the secretion of Benzoquinones (BQs) consist of methyl-1,4-benzoquinone(MBQ) and Ethyl-1,4-Benzoquinone (EBQ), and accumulation of Aflatoxins (AFs) in wheat flour stored at different periods. Methods: Forty grams of wheat flour were put into small glass jars (8 cm diameter and 12 cm length). Then T. castaneum was put in each jars at rates of 10, 20 and 30 unsexed pairs of insect adult. The jars were covered with muslin cloth and the rubber band was fixed to prevent insects to escape. A glass jar without any insects served as the control. The jars lifted on bench in the laboratory for two, three and four months of storage under laboratory temperature conditions (with average 28 ± 20C and 65±5 R.H). The previous design was replicated three times. At the end of each storage period, the jars containing the flour were sieved thoroughly by 40 wire mesh size to separate the insects. The insects have been counted on the other hand wheat flour was prepared to determine MBQ, EBQ and AFs by HPLC methods. Results: The results indicated the levels of EBQ higher than MBQ in all infested samples at all insect densities (No. of insect pairs). The concentrations of MBQ in wheat flour released by ten adult pairs (10P) with the three storage periods two, three and four months were 10.42 ± 0.56, 22.38 ± 3.67, 27.06 ± 6.71µg/g, respectively. These results increased with insect densities to (30p) were 39.67 ± 0.10, 63.58 ± 2.35 and 106.24 ± 7.4 µg/g after storage periods two, three and four months, respectively. In addition to the concentrations of EBQ with (10P) were 67.45 ± 3.64, 98.0 ± 6.1 204.66 ± 5.8 µg/g with storage periods two, three and four months, respectively. In case (30P) the levels of EBQ were 376.7 ± 0.87, 570.1 ± 2.11 and 1558.66 ± 10.88 (µg/g). The highest concentration of the BQs 1664.90 ± 11.43 (µg/g) released by T. castaneum achieved with the highest adult emergence (1021 insect adult) and the highest insect density (30p) at four months storage period. In general, AFs levels enhanced with a period of storage and insect densities. Conclusion: Levels of the BQs (MBQ and EBQ) increased with an increase of storage periods and insect densities. Therefore, the presence of this insect should be prevented in stored wheat flour reducing AFs contamination is possible by storage for short time and prohibit insects which causes an increase temperature of the flour and moisture, all of which promote production of AFs.

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Section: Relationship Between Insect Density Of T Castaneum and Levementioning

confidence: 99%

Impact of Insect Densities Tribolium Castaneum on the Benzoquinone Secretions and Aflatoxins Levels in Wheat Flour During Storage Periods

El-Desouky¹,

El-Badawy²,

Hussain³

et al. 2018

TOBIOTJ

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“…control and monitor the quality of the stored grain (JIAN et al, 2012). Even though some volatiles produced by insects (SENTHILKUMAR et al, 2012), fungi, and grain (MYERS et al, 2012) are detected under controlled laboratory condition, it is not very clear as to which and how many chemicals are produced inside stored grain bins (Table 5).…”

Section: Contamination Of the Productsmentioning

confidence: 99%

Reduction of the Contamination in the Processes of Feed Production Using the System of Hazard Analysis and Critical Control Points (Haccp)

Coradi

Filho

Chaves

et al. 2014

RBTA

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Reduce contamination in feed industries is a big challenge for all the companies to get better products and to expand the consumer marketing. Thus, the aim of this study was to identify and evaluate contamination of a feed mill, suggesting a control plan based on the system of Hazard Analysis and Critical Control Points (HACCP). The experimental activities were conducted in a poultry feed facility with a capacity of 1,000 ton/day, located in Minas Gerais state, Brazil. The evaluation of the contamination was performed on flow corn, soybean meal, and feed production. After 72 hours of operation of the equipment, high levels of microbiological contamination were identified on the surface. The low physical quality of the products (4.2% impurities, 15.83% w.b., aw 0.85) favored the development of insects (7), fungi (1.2x10 7 CFU.g -1 ) and bacteria (1.0x10 7 CFU.g -1 ) in batches grain, and animal byproducts. The high rate of contamination in raw materials enabled the formation of mycotoxins (aflatoxins of 60 ppb, 28 ppm of fumonisins) in the final products. In the steps of receiving and storage of raw materials showed the highest levels of microbiological contamination, increasing the risk of contamination of the feed end. It was concluded that the contamination physic-chemical and microbiological processing unit found in the diet adversely affect the quality of the finished feed. For quality control of products was necessary to monitor all stages of production since the arrival of the raw material until dispatch of the diets.

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“…These physical, chemical, and biological changes are used to control and monitor the quality of the stored grain [12,34,53,57,60]. Even though some volatiles produced by insects [67], fungi, and grain [12] are detected under controlled laboratory condition, it is not very clear as to which and how many chemicals are produced inside stored grain bins.…”

Section: Interaction Among Factors In Stored-grain Ecosystemmentioning

confidence: 99%

The Ecosystem Approach to Grain Storage

Jian

Jayas

2012

Agric Res

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The progress in understanding the stored grain ecosystem is reviewed. Succession of insects, insect movement and distribution, interaction among insects and microflora, and the development of hot spots inside stored grain ecosystems are evaluated. Based on these case studies, we examined the understanding of the stored grain ecosystem from the view of ecosystem approach. To understand the storage grain ecosystem, integration of the parts (the collected data under small scale laboratory conditions) into a usable whole (the entire grain storage ecosystem) is required. To verify the synthesised whole, both small and full scale tests are required. To manage the stored grain ecosystem, understanding the ecosystem and application of ecosystem approach are the keys.

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Characterization of volatile organic compounds released by granivorous insects in stored wheat

Cited by 27 publications

References 12 publications

Impact of Insect Densities Tribolium Castaneum on the Benzoquinone Secretions and Aflatoxins Levels in Wheat Flour During Storage Periods

Impact of Insect Densities Tribolium Castaneum on the Benzoquinone Secretions and Aflatoxins Levels in Wheat Flour During Storage Periods

Reduction of the Contamination in the Processes of Feed Production Using the System of Hazard Analysis and Critical Control Points (Haccp)

The Ecosystem Approach to Grain Storage

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