Development of nanoalumina dust as insecticide against Sitophilus oryzae and Rhyzopertha dominica |
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Authors: | M Buteler SW Sofie DK Weaver D Driscoll J Muretta T Stadler |
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Institution: | 1. Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA) CCT Comahue CONICET, Bariloche Rio Negro, Argentina;2. Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, USAlpe@mendoza-conicet.gob.ar;4. Department of Mechanical and Industrial Engineering, Montana State University, MT, USA;5. Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, USA;6. Instituto de Medicina yBiología Experimental de Cuyo (IMBECU) CCT Mendoza CONICET, Mendoza, Argentina |
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Abstract: | 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. |
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Keywords: | aluminum oxide surface area particle size stored product pest nanopesticide |
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