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Combined toxicity of imidacloprid and three insecticides to the earthworm, Eisenia fetida (Annelida, Oligochaeta)

文献类型： 外文期刊

作者： Cang, Tao 1 ; Dai, Dejiang; Yang, Guiling 1 ; Yu, Yijun; Lv, Lu 1 ; Cai, Leiming 1 ; Wang, Qiang 1 ; Wang, Yanhua 2 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Qual & Standard Agroprod, Minist Agr,State Key Lab Breeding Base Zhejiang S, Lab Hangzhou Risk Assessment Agr,Key Lab Pesticid, Hangzhou 310021, Zhejiang, Peoples R China

2.Zhejiang Acad Agr Sci, I

关键词： Combined pollution;Neonicotinoid insecticide;Terrestrial ecotoxicology;Earthworm;Synergistic effect

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

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收录情况： SCI

摘要： Although the earthworm Eisenia fetida has been used in many ecotoxicological studies in recent years, most of these studies have only focused on assessing the effects of individual insecticides. In the present study, we aimed to compare the individual and combined toxic effects of imidacloprid and three insecticides (phoxim, chlorpyrifos, and lambda-cyhalothrin) on E. fetida. We showed that imidacloprid had the highest intrinsic toxicity to the worms in filter paper contact test, followed by phoxim and lambda-cyhalothrin, while the least toxicity was found from chlorpyrifos. Moreover, 14-day soil toxicity test revealed that the highest toxicity was still detected for imidacloprid with an LC50 value of 2.82 (2.61 similar to 3.17) mg a.i. kg(-1) dry weight (DW), followed by chlorpyrifos with an LC50 value of 384.9 (353.5 similar to 440.3) mg a.i. kg(-1) DW. Meanwhile, a relatively less toxicity was found for lambda-cyhalothrin with an LC50 value of 560.3 (475.9 similar to 718.5) mg a.i. kg(-1) DW, while the lowest toxicity to E. fetida was observed for phoxim with an LC50 value of 901.5 (821.3 similar to 1017) mg a.i. kg(-1) DW. In addition, significant synergistic responses were found from the ternary mixture of imidacloprid-phoxim-lambda-cyhalothrin and quaternary mixture of imidacloprid-phoxim-chlorpyrifos-lambda-cyhalothrin in both bioassay systems. Therefore, our findings highlighted that the simultaneous presence of several insecticides in the soil environment might lead to increased toxicity, resulting in serious damage to the nontarget organisms compared with individual insecticides.

  • 相关文献

[1]Comparative acute toxicity of twenty-four insecticides to earthworm, Eisenia fetida. Wang, Yanhua,Cang, Tao,Zhao, Xueping,Yu, Ruixian,Chen, Liping,Wu, Changxing,Wang, Qiang. 2012

[2]Mixture toxicity of four commonly used pesticides at different effect levels to the epigeic earthworm, Eisenia fetida. Yang, Guiling,Chen, Chen,Guo, Dongmei,Qian, Yongzhong,Yang, Guiling,Wang, Yanhua,Peng, Qi,Zhao, Huiyu,Wang, Qiang.

[3]Do organic silicon and imidacloprid synergistically induce toxicity to the new invasive mealybug Phenacoccus solenopsis Tinsley on Portulaca grandiflora plants?. Huang, Jun,Zhang, Juan,Li, Mingjiang,Wang, Daoze,Zhang, Lili,Xu, Yijuan.

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