@conference{
author = "Radojković, Aleksandar and Radović, Marko and Krnjajić, Slobodan and Kostić, Igor and Mitrović, Jelena and Branković, Zorica and Branković, Goran",
year = "2015",
abstract = "Alumina powders synthesized by combustion method were applied on
uninfested grains of bean to examine their insecticide effect against bean weevil
(Acanthoscelides obtectus). Effects of pH value (6, 8 and 10) of the precursor
solution, as well as citric/nitric molar ratio (0.5, 0.8 and 1.2) on the powder
properties were observed. XRD analysis of the samples calcined at 1200 ºC for 1 h
showed only the presence of α–Al2O3 phase. SEM analysis revealed difference
between the samples in respect to particle size, which varied from nano- and
submicron size to characteristic rectangular particles of several µm and larger. The
powder obtained from the solution with the pH value of 10 had the highest content
of submicron and nanosized particles. Mortality rate of both male and female insects
after seven days of exposure was the highest right for this sample, indicating that the
particle size has the greatest influence on insecticide properties of alumina powders.
Thus, by increasing the pH of the precursor solution it is possible to prevent higher
degree of particles agglomeration. The lowest insecticide efficiency of the powder
synthesized at pH = 6 can be prescribed to a weak chelating effect of the citric acid
that allowed higher coarsening rate of the particles. When it comes to citric/nitric
molar ratio at pH = 8, it had no significant effect on mortality rates, which were
higher for male insects in general, while a slight efficiency trend was observed
towards fuel lean region, i.e. when the ratio was ≤ 0.8.",
publisher = "Društvo za keramičke materijale Srbije",
journal = "3rd Conference of the Serbian Society for Ceramic Materials",
title = "INSECTICIDE EFFECT OF ALUMINA POWDERS AGAINST - BEAN WEEVILS",
pages = "76",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2336"
}