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首页> 外文期刊>Environmental toxicology and chemistry >Chronic Toxicity of 6 Neonicotinoid Insecticides to Chironomus dilutus and Neocloeon triangulifer
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Chronic Toxicity of 6 Neonicotinoid Insecticides to Chironomus dilutus and Neocloeon triangulifer

机译：6种新烟碱类杀虫剂对Dironus dilutus和Neocloeon triangulifer的慢性毒性

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摘要

Neonicotinoid insecticides are frequently detected in surface waters near agricultural areas, leading to a potential for chronic exposure to sensitive aquatic species. The midge Chironomus dilutus and the mayfly Neocloeon triangulifer have been shown to be acutely sensitive to neonicotinoids. Previous studies have established chronic effects of some neonicotinoids on C. dilutus, but reproduction has not been studied. Toxic effects have not been assessed using N. triangulifer. We present the results of chronic, static-renewal tests for 6 neonicotinoids (acetamiprid, clothianidin, dinotefuran, imidacloprid, thiacloprid, and thiamethoxam) with C. dilutus (56-d in length) and N. triangulifer (32-d in length). Emergence was generally the most sensitive endpoint for both species across all neonicotinoids. Effect concentrations, 10% (EC10s; emergence) were 0.03 to 1.1gL(-1) for acetamiprid, clothianidin, imidacloprid, and thiacloprid. Dinotefuran and thiamethoxam were less potent, with EC10s (C. dilutus) or median effect concentrations (EC50s; N. triangulifer) of 2.2 to 11.2gL(-1). Hazard was assessed through comparison of neonicotinoid environmental concentrations from agricultural surface waters in Ontario (Canada) with either the 5th percentile hazard concentration (for imidacloprid) or species-specific EC10s from the present study (for all remaining neonicotinoids). The resulting hazard quotients (HQs) indicated little to no hazard (HQ 1) in terms of chronic toxicity for acetamiprid, dinotefuran, thiacloprid, or thiamethoxam. A moderate hazard (HQ 1) was found for emergence of N. triangulifer for clothianidin, and a high hazard (HQ=74) was found for imidacloprid. Environ Toxicol Chem 2018;37:2727-2739. (c) 2018 SETAC
机译：在农业地区附近的地表水中经常发现新烟碱类杀虫剂，导致潜在地长期暴露于敏感的水生物种。业已证明，ge蚊和and可能对新烟碱类过敏。先前的研究已经确定了一些新烟碱类物质对淡水梭菌的慢性影响，但尚未研究繁殖。未使用三角淋病奈瑟菌评估毒性作用。我们介绍了6种新烟碱类化合物（乙酰胺，布比尼丁，双替呋喃，吡虫啉，噻虫啉和噻虫嗪）与C. dilutus（长56-d）和N. triangulifer（长32-d）的长期静态更新结果。 。对于所有新烟碱类，这两种物种的出现通常是最敏感的终点。乙酰胺，可比丁，吡虫啉和噻虫啉的有效浓度10％（EC10s;出现）为0.03至1.1gL（-1）。 Dinotefuran和噻虫嗪的效力较弱，EC10s（C. dilutus）或中位效应浓度（EC50s; N. triangulifer）的浓度为2.2至11.2gL（-1）。通过比较安大略省（加拿大）农业地表水中新烟碱的环境浓度与本研究中第5个百分位数的危害浓度（吡虫啉）或物种特异性EC10（对于所有其余的新烟碱）进行评估，评估危害程度。就对乙酰胺类，二甲呋喃，噻虫啉或噻虫嗪的慢性毒性而言，所得的危害商（HQs）几乎没有危害（HQ <1）。发现对穿甲宁的三角芽孢杆菌存在中等危害（HQ> 1），对吡虫啉有较高危害（HQ = 74）。 Environ Toxicol Chem 2018; 37：2727-2739。 （c）2018年SETAC

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