摘要
本文以斜生栅藻、大型水蚤和草鱼为试验生物,研究植物生长调节剂多效唑对水生生物的急性毒性效应。多效唑对斜生栅藻EC_(50)-96h为20.62mg/l;对大型水蚤LC_(50)-48h为21.86mg/h;对草鱼苗静态生物检测结果为LC_(50)—120h 16.33mg/l,流水生物检测结果为LC_(50)-96h 14.36mg/l,LC_(50)-120h 9.13mg/l。经多效唑处理后,藻的细胞形态也发生明显改变。根据农药的实验室毒性评价划分标准,多效唑对三种生物的毒性均属低毒;田间安全性预评价的结果也表明其毒性为低毒,故认为多效唑是一种对水生生物危害较小的农药。但其慢性毒性及长期积累效应,尚有待进一步研究。
In this study,Scendesmusobliqaus,daphnia magna and Ctenopharyngodon idellus were selected to study the acute toxicity of Paclobutrazol to different categories of aquatic organism. The EC50-96hr to Scenedesmus obliqaus is 20. 62mg/l and the LC50-48hr to Daphnia magna is 21. 86 mg/ 1. The LC50-120hr in static bio-test is 16. 33mg/l, while in flowing-water tests, LC50-96hr is 14. 36mg/l and the LC50-120hr is 9.13mg/l. According to the pesticide toxicity evaluation standard in laboratory, the toxicity of Paclobutrazol to the aquatic organisms is low. The result of preliminary safety e-valuation in field also demonstrates that Padobutrezol is low toxic. Therefore,it can be concluded that the pesticide is less dangrous to aquatic organisms. However, its chronic toxicity and long term accumulation effect are needed to further study.
出处
《农村生态环境》
CSCD
1993年第1期39-42,共4页
Rural Eco-Environment
关键词
多效唑
水生生物
毒性
评价
Paclobutrazol, aquatic organism, acute toxicity, biological test
