Disinfestation of stored wheat grain infested with Rhyzopertha dominica by ozone treatment: process optimization and impact on grain properties

2019 ◽  
Vol 99 (11) ◽  
pp. 5008-5018 ◽  
Author(s):  
Gayatri Mishra ◽  
Aphiya Amulya Palle ◽  
Shubhangi Srivastava ◽  
Hari N Mishra
Keyword(s):  
Process Optimization ◽  
Treatment Process ◽  
Rhyzopertha Dominica ◽  
Ozone Treatment ◽  
Wheat Grain ◽  
Stored Wheat ◽  
Grain Properties

scholarly journals Effects of abamectin on lesser grain borer, Rhyzopertha dominica F. (Coleoptera: Bostrichidae), infestation on some stored grains

2020 ◽  
Vol 30 (1) ◽  
Author(s):  
Vesna Perišić ◽  
Vladimir Perišić ◽  
Filip Vukajlović ◽  
Dragana Predojević ◽  
Vera Rajičić ◽  
...  
Keyword(s):  
Insect Pests ◽  
Rhyzopertha Dominica ◽  
Streptomyces Avermitilis ◽  
Main Body ◽  
Positive Aspect ◽  
Stored Wheat ◽  
Chemical Traits ◽  
Grain Properties ◽  
Physical And Chemical ◽  
Grain Protection

Abstract Background Modern methods of stored wheat grain protection from insect pests strive towards optimizing the use of different techniques and methods within integrated pest management (IPM) programs. One of the methods of integral grain protection is the application of natural originating insecticides. Main body The potential of the natural origin synthetic insecticide abamectin (a product of soil bacteria, Streptomyces avermitilis fermentation) on the grain borer, Rhyzopertha dominica F. (Coleoptera: Bostrichidae), in stored wheat, barley, ray, oats, and triticale was evaluated. The evaluation was conducted in 3 rates. The effects of its application on the infestation of R. dominica on certain physical and chemical traits of cereal grains were examined. The efficacy of abamectin after 7 days of exposure, in all applied dosages, was low (< 56.5% in wheat and < 30.5% in other grains). Abamectin efficacy was significantly increased after 14 days of exposure. R. dominica mortality was 99.0 and 100% after 21-day exposure at the abamectin rates of 0.5 and 1.0 mg kg−1, respectively. Ten weeks after grain treatment, the 3 examined rates prevented the emergence of progeny. The amount of the damaged grains and dockage, as a nus-product of feeding of R. dominica larvae and imago, compared to the untreated, infested sample was significantly smaller, which represents a positive aspect of abamectin application. The application did not change significantly the moisture, protein, and ash contents, in comparison to the control. Conclusion Positive aspects of the abamectin application on different grain species (wheat, barley, rye, oats, and triticale) caused the highest rates of R. dominica mortality after 21 days of exposure where a total prevention of progeny emergence and absence of changes on technological grain properties occurred.

scholarly journals The Status of Insect Pests Prevailing in Stored Wheat Grain under Traditional Storages of Cheha District of Gurage Zone of South Central Ethiopia

2020 ◽  
pp. 1-7
Author(s):  
Tsehaynew Wubetu ◽  
Berhanu Hiruy
Keyword(s):  
Insect Pests ◽  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica ◽  
Southern Ethiopia ◽  
Wheat Grain ◽  
Wheat Grains ◽  
Central Ethiopia ◽  
Stored Wheat ◽  
South Central ◽  
The Status

Aim: To assess the status of the insect pests of stored wheat grains in Cheha destrict of Gurage Zone of Southern Ethiopia. Study Design: Peasant associations were selected purposefully based on intensity of wheat production, such that those peasant association growing wheat predominantly were selected for the survey, while villages, representative farmers and their storage systems were selected randomly using a nested design. Place and Duration of Study: Survey was conducted between 1, July to 30, December 2019 with the interval of one month in major wheat growing peasant associations of Cheha district of south central Ethiopia. Methodology: The assessment on abundance was made from of half kilogram of wheat grain sample taken from 135 randomly selected farmer’s storages of three peasant associations using taxonomic keys of books related to stored product insects. Results: Eight major species of insect pests consisting of four primary pests and four secondary pests belonging to five families with in two insect orders were documented. Of these pests recorded, Sitophilus oryzae, Sitophilus zeamais, Sitotroga cereallella, Tribolium castaneum and Tribolium confusum, respectively were the most prevalent and frequently occurring as they appeared between 12.74 and 33.78 individuals per 100 g of grain and as they occurred in the range between 77.78 and 92.26% per 100 g of sample wheat grain collected from the survey sites, respectively. These were followed by Cryptolestes ferrugineus, Cryptolestes pusillus and Rhyzopertha dominica which occurred between 7.26 and 10.74 individuals per 100 g of grain and in ranges between 51.85 and 66.67% per 100 g of sample wheat grain collected. Conclusion: The traditional methods and practices used by farmers were inefficient for sufficient wheat grains protection against insect pests in storages; this implies for the urgent need for designing management strategies for more effective and sustainable methods of control.

Volatile organic compounds associated with postharvest fungi detected in stored wheat grain

2017 ◽  
Vol 46 (5) ◽  
pp. 483-492
Author(s):  
E. H. Barkat ◽  
B. Du ◽  
Y. Ren ◽  
G. E. St J. Hardy ◽  
Kirsty L. Bayliss
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Wheat Grain ◽  
Stored Wheat ◽  
Volatile Organic

Hydrophilicity Control of Ag-Paste Electrodes by UV/Ozone Treatment

2021 ◽  
Vol 21 (8) ◽  
pp. 4418-4422
Author(s):  
Seongwan Kim ◽  
Yunsook Yang ◽  
Sheik Abdur Rahman ◽  
Woo Young Kim
Keyword(s):  
Thin Film ◽  
Surface Energy ◽  
Electrode Material ◽  
Treatment Process ◽  
Ozone Treatment ◽  
Bonding Force ◽  
Low Surface Energy ◽  
Ag Paste ◽  
Uv Ozone ◽  
Paste Electrode

Ag-paste is used as an electrode material in various fields as a manufacturing advantage that enables solution processing. However, when a subsequent thin film is formed on the solidified Ag-paste electrode, there is a fear that the bonding force between the Ag-paste electrode and the subsequent thin film is weakened and peeled off due to the low surface energy of the Agpaste electrode. It is necessary to increase the surface energy of the Ag-paste electrode surface since it ultimately directly affects the yield of the device or product. In this study, the UV/ozone treatment process was introduced to increase the Ag-paste surface energy, thereby making the surface hydrophilic. Additionally, it was confirmed that the UV/ozone treatment process affected only the surface of the Ag-paste electrode by extracting the contact resistance.

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