Ternary toxicological interactions of insecticides, herbicides, and a heavy metal on the earthworm Eisenia fetida
文献类型: 外文期刊
作者: Wang, Yanhua 1 ; Chen, Chen 2 ; Qian, Yongzhong 2 ; Zhao, Xueping 1 ; Wang, Qiang 1 ;
作者机构: 1.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, State Key Lab Breeding Base Zhejiang Sustainable, Key Lab Pesticide Residue Detect,Minist Agr, Hangzhou 310021, Zhejiang, Peoples R China
2.Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Minist Agr, Key Lab Agroprod Qual & Safety, Beijing 100081, Peoples R China
关键词: Insecticide;Herbicide;Heavy metal;Eisenia fetida;Acute mixture toxicity;Combination index
期刊名称:JOURNAL OF HAZARDOUS MATERIALS ( 影响因子:10.588; 五年影响因子:10.129 )
ISSN:
年卷期:
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收录情况: SCI
摘要: The combined toxicities of five insecticides (chlorpyrifos, avermectin, imidacloprid, lambda-cyhalothrin, and phoxim), two herbicides (atrazine and butachlor), and a heavy metal (cadmium) have been examined using the acute toxicity test on the earthworm. With a concentration of 2.75 mg/kg being lethal for 50% of the organisms, imidacloprid exhibited the highest acute toxicity toward the earthworm Eisenia fetida. Toxicological interactions of these chemicals in ternary mixtures were studied using the combination-index (Cl) equation method. Twenty-one ternary mixtures exhibited various interactive effects, in which 11 combinations showed synergistic effects, four led to dual synergistic/additive behaviors, one exhibited an additive effect, and five showed increasing antagonism within the entire range of effects. The Cl method was compared with the classical models of concentration addition and independent action, and it was found that the Cl method could accurately predict combined toxicity of the chemicals studied. The predicted synergism in the majority of the mixtures, especially at low-effect levels, might have implications in the real terrestrial environment. (C) 2014 Elsevier B.V. All rights reserved.
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