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Teodoro Stadler
Laboratorio de Toxicología Ambiental, Instituto de Medicina y Biología Experimental de Cuyo (IMBECU), CCT Mendoza CONICET– Universidad Nacional de Cuyo, Mendoza, Argentina

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Short communication
Published: 18 September 2020 in Journal of Stored Products Research
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The current study presents the design and evaluation of a laboratory device combining mechanical motion of wheat grain and turbulent air streaming inside a positive pneumatic conveyor system. The device recovers microparticulate nano-engineered alumina insecticide powders (NAIP) from treated grain. The particle removal efficiency of the conveying system was experimentally quantified by using a laboratory prototype assembled by attaching an electrostatic filter (EF) to the conveyors exhaust. Then, the NAIP particles detached from the grain inside the conveyor were drawn by the conveyors’ exhaust air stream into the EF, where particles bound to the electrodes due to electric charge differences. The NAIP particle load bound to the EF electrodes was removed and weighed to determine the efficiency of the wheat grain cleaning process. Our experimental results, under laboratory conditions, show that the recovery efficiency of the prototype averaged 98.0% (±1.4). Thus, the present study provides an innovative strategy to remove NAIP insecticide particles after storage, once their role as insecticide in stored grain has been fulfilled. This technology provides advancement in grain technology allowing the possibility to provide insecticide-free grain to the food market.

ACS Style

Micaela Buteler; Javier G. Gitto; Teodoro Stadler. Enhancing the potential use of microparticulate insecticides through removal of particles from raw grain. Journal of Stored Products Research 2020, 89, 101707 .

AMA Style

Micaela Buteler, Javier G. Gitto, Teodoro Stadler. Enhancing the potential use of microparticulate insecticides through removal of particles from raw grain. Journal of Stored Products Research. 2020; 89 ():101707.

Chicago/Turabian Style

Micaela Buteler; Javier G. Gitto; Teodoro Stadler. 2020. "Enhancing the potential use of microparticulate insecticides through removal of particles from raw grain." Journal of Stored Products Research 89, no. : 101707.

Journal article
Published: 23 July 2018 in Insects
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Most stored-grain pest insects increase their population within a relatively short time, causing serious damage to stored products. Sitophilus oryzae (L.) is one of the world’s major stored-grain pest insects and was chosen as the model insect for our studies. This study compared the efficacy of three different dusts under laboratory conditions: aluminum dust (nanostructured alumina), DiatomiD®, and Protect-It® (commercial diatomaceous earth). Parental survival, grain damage, and progeny production were measured at 250 and 500 ppm in treated wheat. The tests were conducted in 400 mL galvanized steel jars, an experimental model used for the first time to measure the effectiveness of nanostructured alumina, since most studies have been typically performed in small petri dishes. Parental survival obtained was highest in the untreated controls, followed in decreasing order by DiatomiD®, Protect-It®, and nanostructured alumina (NSA). NSA caused the greatest mortality. All treatments significantly reduced grain weight loss and frass production in wheat infested by S. oryzae. The degree of progeny (F1) suppression was directly related to the product and treatment rate, progeny being significantly suppressed by NSA in wheat followed by Protect-It® and DiatomiD®. Therefore, NSA had a greater impact on insect population dynamics.

ACS Style

Guillermo Pablo López-García; Micaela Buteler; Teodoro Stadler. Testing the Insecticidal Activity of Nanostructured Alumina on Sitophilus oryzae (L.) (Coleoptera: Curculionidae) Under Laboratory Conditions Using Galvanized Steel Containers. Insects 2018, 9, 87 .

AMA Style

Guillermo Pablo López-García, Micaela Buteler, Teodoro Stadler. Testing the Insecticidal Activity of Nanostructured Alumina on Sitophilus oryzae (L.) (Coleoptera: Curculionidae) Under Laboratory Conditions Using Galvanized Steel Containers. Insects. 2018; 9 (3):87.

Chicago/Turabian Style

Guillermo Pablo López-García; Micaela Buteler; Teodoro Stadler. 2018. "Testing the Insecticidal Activity of Nanostructured Alumina on Sitophilus oryzae (L.) (Coleoptera: Curculionidae) Under Laboratory Conditions Using Galvanized Steel Containers." Insects 9, no. 3: 87.

Articles
Published: 02 January 2015 in International Journal of Pest Management
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This study aims to characterize and improve the insecticidal activity of nanostructured alumina dusts. To accomplish these goals, multiple solution based synthesis routes utilizing standard aluminum salt precursors were utilized to synthesize three unique types of alumina dust. These were compared with regards to morphology, particle size and surface area using electron microscopy and dynamic light scattering particle size analysis. Insect toxicity of the various dusts was assessed using two insect species that are pests of stored grain, Sitophilus oryzae and Rhyzopertha dominica. The dust synthesized using a modified glycine-nitrate combustion process consistently yielded greater mortality rates, and all dust types were more effective on S. oryzae than on R. dominica, although the difference varied across dust types. The data show that insecticidal activity is dependent on particle size, particle morphology and surface area but also indicated that minimizing particle size and maximizing surface area are not the sole dominant factors influencing efficacy. This study does however suggest that pesticide dusts can be engineered through modified synthesis to better target different insect species.

ACS Style

M. Buteler; S.W. Sofie; D.K. Weaver; D. Driscoll; J. Muretta; T. Stadler. Development of nanoalumina dust as insecticide againstSitophilus oryzaeandRhyzopertha dominica. International Journal of Pest Management 2015, 61, 80 -89.

AMA Style

M. Buteler, S.W. Sofie, D.K. Weaver, D. Driscoll, J. Muretta, T. Stadler. Development of nanoalumina dust as insecticide againstSitophilus oryzaeandRhyzopertha dominica. International Journal of Pest Management. 2015; 61 (1):80-89.

Chicago/Turabian Style

M. Buteler; S.W. Sofie; D.K. Weaver; D. Driscoll; J. Muretta; T. Stadler. 2015. "Development of nanoalumina dust as insecticide againstSitophilus oryzaeandRhyzopertha dominica." International Journal of Pest Management 61, no. 1: 80-89.