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首页> 外文期刊>Australasian journal of ecotoxicology: the official journal of the Australasian Society for Ecotoxicology >RIVER WATER AND SEDIMENT REDUCE THE TOXiCITY OF DELTAMETHRIN TO PARATYA AUSTRALIENSIS
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RIVER WATER AND SEDIMENT REDUCE THE TOXiCITY OF DELTAMETHRIN TO PARATYA AUSTRALIENSIS

机译：河流水和沉积物降低了地尔莫西林对澳大利亚马铃薯的毒性

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摘要

Deltamethrin is a pyrethroid insecticide used extensively to control cotton pests in Australia and worldwide. Deltamethrin readily binds to organic and particulate matter in the environment, thereby reducing its bioavailability and toxicity, yet most toxicity data come from studies using clean, organic matter-free water that were conducted under conditions that differ greatly from those in the turbid rivers of the cotton-growing regions of Australia.The aim of this study was to assess the toxicity of deltamethrin to the native glass shrimp, Paratya australiensis, and to consider the role of suspended and bottom sediment in the amelioration of deltamethrin toxicity. We conducted a series of acute single-species toxicity tests in the laboratory and in the field in the Namoi-Gwydir cotton region of northwest New South Wales, Australia.The toxicity of deltamethrin was significantly (p<0.05) reduced in river water compared with that in laboratory water in laboratory but not field-based tests. The toxicity of deltamethrin in river water was further reduced with the addition of bottom sediment. Despite reductions in toxicity in natural waters, deltamethrin remained highly toxic (i.e. 60-h EC50 values <200 ng/L) to P. australiensis, and thus further investigation of the hazard of deltamethrin is warranted.
机译：溴氰菊酯是一种拟除虫菊酯类杀虫剂，在澳大利亚和全球范围内广泛用于防治棉虫。溴氰菊酯很容易与环境中的有机物和颗粒物结合，从而降低其生物利用度和毒性，但是大多数毒性数据来自使用清洁，不含有机物的水进行的研究，该研究在与浑浊的河流截然不同的条件下进行。这项研究的目的是评估溴氰菊酯对本地玻璃虾澳大利亚梧桐的毒性，并考虑悬浮和底部沉积物在溴氰菊酯毒性改善中的作用。我们在澳大利亚新南威尔士州西北部的Namoi-Gwydir棉区的实验室和田间进行了一系列急性单种毒性试验，与河水中相比，溴氰菊酯的毒性显着降低（p <0.05）实验室用水，而不是现场测试。通过添加底部沉积物，溴氰菊酯在河水中的毒性进一步降低。尽管减少了天然水中的毒性，溴氰菊酯对澳大利亚假单胞菌仍具有剧毒（即60小时EC50值<200 ng / L），因此有必要进一步研究溴氰菊酯的危害性。

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