عنوان مقاله [English]
In this study, silica nanoparticles (SNPs) were prepared by sol-gel technique. Chlorpyrifos (40.8% EC) was loaded on the SNPs by immersion loading method. The Specific surface area (SBET) of nanosilica was characterized by BET and recorded 102.24 m2/g. Loading efficiency of chlorpyrifos-loaded in silica nanoparticles (Ch-SNPs) was measured 86.79% using UV-VIS spectrophotometer. According to FT-IR results, chlorpyrifos properties remained intact after loading on nanosilica because of physical adsorption process of the insecticide in the pores. The residual toxicity of Ch-SNPs was assessed against two stored product insect species, Rhyzopertha dominica F. and Tribolium confusum Jacquelin du Val. on Petri dish, galvanized steel, mosaic and concrete surfaces. Residual toxicity was evaluated 7, 15, 30, 45 and 60-day post treatment. For each post treatment, the mortality was counted after 6, 24, 48 and 72 h of exposure. The mortality increased with increasing concentration of insecticide and time exposed to each concentration. According to the results, the Ch-SNP was effective against the both pest species, but the toxicity varied depending on the surface material. Ch-SNPs provided long-term protection on petri dishes against the pests, whilst concrete followed by mosaic surfaces with less protection. For instance, R. dominica mortality percentage after 24 h exposure to Petri dish, galvanized steel, mosaic and concrete treated with 0.2 mg cm-2 Ch-SNPwas 100, 82.8, 40 and 1.4%, whereas the mortality was 100, 97.1, 20 and 18.5 % for T. confusum at 60-day post-treatment, respectively.
Andric, G., Kljajic, P. & Prazic-Golic, M. (2014) Residual efficacy of cypermethrin and pirimiphos-methyl against Sitophilus granarius (L.) and Plodia interpunctella (Hübner) on concrete surface. Pesticidi i fitomedicina 29, 275-281.
Arthur, F. H. (2004) Evaluation of methoprene alone and in combination with diatomaceous earth to control Rhyzopertha dominica (Coleoptera: Bostrichidae) on stored wheat. Journal of Stored Products Research 40, 485-498.
Athanassiou, C. G., Arthur, F. H. & Throne, J. E. (2011) Efficacy of layer treatment with methoprene for control of Rhyzopertha dominica (Coleoptera: Bostrychidae) on wheat, rice and maize. Pest Managment Science 67, 380-384.
Athanassiou, C. G., Kavallieratos, N. G., Boukouvala, M. C., Mavroforos, M. E. & Kontodimas, D. C. (2015) Efficacy of alpha-cypermethrin and thiamethoxam against Trogoderma granarium Everts (Coleoptera: Dermestidae) and Tenebrio molitor L. (Coleoptera: Tenebrionidae) on concrete. Journal of Stored Products Research 62, 101-107.
Barik, T., Kamaraju, R. & Gowswami, A. (2012) Silica nanoparticle: a potential new insecticide for mosquito vector control. Parasitology Research 111, 1075-1083.
Debnath, N., Das, S., Seth, D., Chandra, R., Bhattacharya, S. & Goswami, A. (2011) Entomotoxic effect of silica nanoparticles against Sitophilus oryzae (L.). Journal of Pest Science 84, 99-105.
Debnath, N., Das, S., Patra, P., Mitra, S. & Goswami, A. (2012) Toxicological evaluation of entomotoxic silica nanoparticle. Toxicological & Environmental Chemistry 94, 944-951.
Ghimire, M. N., Arthur, F. H., Myers, S. W. & Phillips, T. W. (2016) Residual efficacy of deltamethrin and β-cyfluthrin against Trogoderma variabile and Trogoderma inclusum (Coleoptera: Dermestidae). Journal of Stored Products Research 66, 6-11.
Goswami, A., Roy, I., Sengupta, S. & Debnath, N. (2010) Novel applications of solid and liquid formulations of nanoparticles against insect pests and pathogens. Thin Solid Films 519, 1252-1257.
Jiang, L., Zheng, F., Leng, P. F., Xu, M. & Zhao, M. J. (2010) Advances in research of nano-pesticide. Guangdong Agricultural Science 5, 97-100. [In Chinese with English summary].
Kah, M. & Hofmann, T. (2014) Nanopesticide research: Current trends and future priorities. Environment International 63, 224-235.
Li, Z. Z., Xu, S. A., Wen, L. X., Liu, F., Liu, A. Q., Wang, Q., Sun, H. Y., Yu, W. & Chen, J.F. (2006) Controlled release of avermectin from porous hollow silica nanoparticles: Influence of shell thickness on loading efficiency, UV-shielding property and release. Journal of Controlled Release 111, 81-88.
Liu, C. G., Desai, K. G. H., Chen, X. G. & Park, H. J. (2005) Linolenic acid-modified chitosan for formation of self-assembled nanoparticles. Journal of Agricultural and Food Chemistry 53, 437-441.
Liu, F., Wen, L.-X., Li, Z.-Z., Yu, W., Sun, H.-Y. & Chen, J.-F. (2006) Porous hollow silica nanoparticles as controlled delivery system for water-soluble pesticide. Materials Research Bulletin 41, 2268-2275.
Makino, Y., Oshita, S., Murayama, Y., Mori, M., Kawagoe, Y. & Sakai, K. (2009) Nondestructive analysis of chlorpyrifos on apple skin using UV reflectance. Transactions of the ASABE 52, 1955-1960.
Nayak, M. K., Collins, P. J. & Kopittke, R. A. (2003) Residual toxicities and persistence of organophosphorus insecticides mixed with carbaryl as structural treatments against three liposcelidid psocid species (Psocoptera: Liposcelididae) infesting stored grain. Journal of Stored Products Research 39, 343-353.
NIST, (2016) Chlorpyrifos [WWW document]. Available in: http://webbook.nist.gov/cgi/cbook. cgi?ID=C2921882&Mask=200.
Obeng-Ofori, D., (2010) Residual insecticides, inert dusts and botanicals for the protection of durable stored products against pest infestation in developing countries. In: Proceedings of the Tenth International Working Conference on Stored Product Protection. Ed. by M O Carvalho, P G Fields, C S Adler, F H Arthur, C G Athanassiou, J F Campbell, F Fleurat-Lessard, P W Flinn, R J Hodges, A A Isikber, S Navarro, R T Noyes, J Riudavets, K K Sinha, G R Thorpe, B H Timlick, P Trematerra & N D G White, Julius-Kühn-Archiv, Estoril, Portugal, 774-788.
Rao, K. S., El-Hami, K., Kodaki, T., Matsushige, K. & Makino, K. (2005) A novel method for synthesis of silica nanoparticles. Journal of Colloid and Interface Science 289, 125-131.
Rouhani, M., Samih, M. & Kalantari, S. (2012) Insecticidal effect of silica and silver nanoparticles on the cowpea seed beetle, Callosobruchus maculatus F.(Col.: Bruchidae). Journal of Entomological Research 4, 297-305.
Rumbos, C. I., Dutton, A. C. & Athanassiou, C. G. (2016) Insecticidal efficacy of two pirimiphos-methyl formulations for the control of three stored-product beetle species: Effect of commodity. Crop Protection 80, 94-100.
Sabbour, M. (2013) Entomotoxicity assay of nanoparticle 4-(silica gel Cab-O-Sil-750, silica gel Cab-O-Sil-500) against Sitophilus oryzae under laboratory and store conditions in Egypt. Scientific Research Reports 1, 67-74.
Sokal, R. R. & Rohlf, F. J., (1995) Biometry: the principles and practice of statistics in biological research. Third edition. 887 pp.
Song, M.-R., Cui, S. M., Gao, F., Liu, Y. R., Fan, C. L., Lei, T. Q. & Liu, D. C. (2012) Dispersible silica nanoparticles as carrier for enhanced bioactivity of chlorfenapyr. Journal of Pesticide Science 37, 258-260.
SPSS, (2007) SPSS 16 for Windows User’s Guide Release, Spss Inc, Chicago
Velki, M., Plavšin, I., Dragojević, J. & Hackenberger, B. K. (2014) Toxicity and repellency of dimethoate, pirimiphos-methyl and deltamethrin against Tribolium castaneum (Herbst) using different exposure methods. Journal of Stored Products Research 59, 36-41.
Wang, Y., Cui, H., Sun, C., Zhao, X. & Cui, B. (2014) Construction and evaluation of controlled-release delivery system of Abamectin using porous silica nanoparticles as carriers. Nanoscale Research Letters 9, 655.
Wen, L. X., Li, Z. Z., Zou, H. K., Liu, A. Q. & Chen, J. F. (2005) Controlled release of avermectin from porous hollow silica nanoparticles. Pest Management Science 61, 583-590.