Insecticidal impact of alumina powders against Acanthoscelides obtectus (Say)

• DOI: 10.1016/j.jspr.2018.02.006
• Publication Date: 2018-03-18T18:34:04Z
• Authors: Jelica Lazarević; Aleksandar Radojk...; Igor Kostić; Slobodan Krnjajić; Jelena Mitrović; Miroslav B. Kostić; Tatjana Novaković; Zorica Branković; Goran Branković
• Keywords: Inert; Specific surface area; Particle (ecology)

Abstract For long-term protection of stored products there is a growing demand to replace chemical insecticides due to their effects on human health and environmental safety. Particulate materials, such as inert dusts and various submicron and nanomaterials have been extensively tested as viable alternatives. This is the first study on the insecticidal impact of alumina powder (α-Al2O3) on the bruchid pest, Acanthoscelides obtectus (Say) (Coleoptera: Chrysomelidae: Bruchinae). By altering the fuel to oxidant molar ratio (F/O: 0.5, 0.8, 1.2) in an autocombustion reaction we synthesized alumina powders with specific surface area and particle size varying from the nano- to micron scale. It was found that particle morphology influenced survival and progeny number of A. obtectus. The order of powders from low to high efficacy in reducing beetle performance (F/O-0.8