Use some nanomaterials as insecticides against the saw-toothed grain beetle oryzaephilus surinamensis L. (Coleoptera : Silvanidae)‎

Abstract EN

Samples of rice amber infected with the saw-toothed grain beetle were collected from local markets in the city of Kirkuk during the month of December 2021, and incubator the experiments were conducted in the laboratories of the colleges of education for pure sciences and veterinary medicine at the university of Kirkuk for the period from February to May 2022, three nanomaterials were used in this study, which included (Nano gold, Nano titanium dioxide and Nano iron oxide).

the toxic effects of these nanoparticles were studied at four different concentrations (0, 500, 1000, 1500) ppm on the life of the saw-toothed grain beetle as the rate of egg laying duration larval and pupa phases and the rate of killing of its adults.

the incubation period for the eggs reached 11.08 days in the titanium dioxide treatment while the incubation period for the eggs reached 10.62 and 9.99 days in the Nano gold and Nano iron oxide treatments respectively, compared to the comparison treatment, which was 8.59 days.

titanium dioxide showed a significant effect on the duration of the larval stage which amounted to 18.84 days while it reached 18.03 and 17.32 days in the Nano gold and iron oxide treatments respectively, compared with the comparison treatment, which amounted to 15.5 days.

while in the pupa stage the period reached 5.93 days in the titanium dioxide treatment and there were no differences significant differences between gold nanoparticles and iron oxide nanoparticles were 5.42 and 5.38 days respectively, compared to the comparison treatment, which amounted to 4.00 days.

and the nanomaterials showed a clear effect on the rates of dead as it reached 100 % in adults of the sawn grain beetle 16 days after the start of the experiment, compared to the comparison treatment, which amounted to 45.55%.

based on our results nanomaterials can be used as effective pesticides to control insects especially saw-toothed grain beetle.