The impact of agrochemicals on the population of litter-dwelling sminthurid collembolans in grassland ecosystems

From August to February, the effects of agrochemicals, including the insecticide Flubendiamide, acaricide Fenazaquin, fungicide Tricyclazole, insect growth regulator (IGR) Buprofezin, and water-soluble fertilizers (50:40:25 kg NPK/ha), on the abundance of sminthurid collembolans in a grassland habitat were studied. Among the treated plots, 2FA (2 foliar applications) of tricyclazole was observed significantly toxic on entomobryids. The fungivores entomobryids food chain was affected by tricyclazole. On the other hand, plot treated with 1FA of fenazaquin sounded safer. There was increase in population on 10 days after treatment (DAT). However, significant reduction in entomobryids was noticed on 30 DAT. Further reduction was observed on 80 and 95 DAT. Maximum reduction was observed in 2FA of fenazaquin on 10 DAT. On 30 DAT, 2FA of fenazaquin and fertilizers reported maximum reduction of entomobryids while, on 80 DAT, plots treated with 2FA of flubendiamide registered maximum reduction over control population. On 95 DAT, plot treated with one and two foliar treatments of fenazaquin, 1FA of flubendiamide, 2FA of buprofezin registered highest reduction over control. Key words: Smithurids Flubendiamide, Fenazaquin, Tricyclazole, Buprofezin, Fertilizers References Al-Haifi, M. A., Khan, M.Z., Abdullah Murshed, V. and Ghole, S., 2006. Effect of dimethoate residues on soil micro-arthropods population in the valley of Zendan, Yemen. J. Appl. Sci. Environ. Mgt., 10(2): 3-41. Artermjeva ,T.I. and Gatilova,F.O.,1975. Soil microfauna changes under the influence of various fertilizers.In:Progress in soil Zoology (Eds.Vanek,J),Academia ,Prague,pp.463-468. Bandyopadhyaya, I., Choudhuri, D. K., Ponge, J. F., 2002. Effects of some physical factors and agricultural practices on Collembola in a multiple cropping programme in West Bengal (India), Eur. 1. Soi/ Biol., 38(1).111-17. Campiche, S., Becker-van, S. K., Ridreau, C. and TarradeIIas J., 2006. Effects of insect growth regulators on the nontarget soil arthropod Folsomia candida (ColIemboIa), Ecocoxicol. Environ. Safety. 63(2): 216-225. Carey, A. M., Dindal, D.L. and Leaf, A. L., 1971.Responses of micro-arthropod populations to potassium fertilization and irrigation. Am.Soc.Agron. Annu. Meeting Agron. Abst., 119. Edwards,C.A. and Lofty,J.R.,1969,The influence of agricultural practices on soil microarthropod population. In: The soil ecosystem (Eds: Sheals,J.G.),Systemic Association,London,pp.237- 247. Forster B., Garcia, M., Francimari, 0. and Rombke, J., 2006. Effects of carbendazim and lambda- cyhalothrin on soil invertebrates and leaf litter decomposition in semi-field and field tests under tropical conditions (Amazonia, Brazil). Eur. J. Soil Biol., 42: 171—179. Fuessel, T. N., 2012. A comparative assessment of the impact of insect growth regulators methoprene on soil mites and function in Brisbrane, Australia. Ph.D. Thesis submitted to Graffith University, Gold coast campus,Queensland. Joy, V. C. and Chakravorty, P. P., 1991. Impact of insecticides on nontarget microarthropod fauna in agricultural soil. EcotoxicoI. Environ. Saf., 22(1):8-16. Kong, W. D., Zhu, Y. G., Fu, B. J., Han, X. Z., Zhang, L. and He, J.Z., 2008. Effect of long- term application of chemical fertilizers on microbial biomass and functional diversity of black soil. Pedosphere, 18(6): 801-808. Marshal, V.G., 1977.Effects of manures and fertilizers on soil fauna: A Review CAB special publication, 3: 79. Mitra, S. K., Dutta, A. L., Mandal, S. B. and Sengupta, D., 1983. Preliminary observations on the effects of the rotation of crops and fertilizers on Collembola. In: New Trends in Soil Biology, Ed. Ph. Lebrun et al., Belgium, pp. 657-663. Qarluq. A. Q., 2010. The impact of Agrochemicals on soil faunal composition. M.Sc. Thesis submitted to University of Agricultural Sciences, Bangalore, p.163. Randhawa, N. S., 1991. The importance of soil zoology in the context of present-day intensive agriculture. In: Advances in Management and Conservation of Soil Fauna (Eds.) Veeresh, G.K., Rajagopal, D. and Viraktamath, C.A., Oxford and IBH publishing Co.Pvt.Ltd.New Delhi, pp. I.3-1.5. Reddy, M.V., Reddy, V.R., Yule, D.F. and George, P.J., 1994. Decomposition of straw in relation to tillage, moisture and arthropod abundance in a semi-arid tropical alfisol. Biol. Fertil. Soils, 17:45- 50. Saha, I. and Joy V. C., 2014. Potential ill effects of IGR pesticides on life-history parameters in ecologically important soil collembola Cyphoderus javonus Borner. Intl. Sci, Environ. Tech., 3(2):365 - 373. Sundararaj, N., Nagaraj, S., Venkataramu, M. N. and Jagannath, M. K., 1972. Design and analysis of field experiments. UAS, Misc. Series, No. 22, Bangalore. Weetman, G.F., Knowles, R. and Hills., 1972. Effects of different form of nitrogen fertilizer on nutrient uptake by black spruce and its humus and humus mesofauna. Pulp and Paper Research Institute, Canada, Wood. Res.Index, 39: 20. Van Leeuwen, T., Witters, J., Nauen, R., Duso. C. and Tirry, L., 2010. The control of eriophyoid mites: state of the art and future challenges. Exp. Appl. Acarol., 51(1- 3): 205-224. Yang, X., Warren, M. and Zou, X., 2007. Fertilization responses of soil litter fauna and litter quantity, quality, and turnover in low and high elevation forests of Puerto Rico. Appl. Soil Ecol., 37: 63- 71.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.