Toxicity of Chiral Pesticide Rac-Metalaxyl and R-Metalaxyl to Daphnia magna

被引：37

作者：

Chen, Shengwen ^{[2
]}

Liu, Weiping ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Biol & Environm Engn, Res Ctr Environm Sci, Hangzhou 310032, Zhejiang, Peoples R China

[2] Shanghai Second Polytech Univ, Sch Urban Dev & Environm Engn, Shanghai 201209, Peoples R China

来源：

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2008年 / 81卷 / 06期

关键词：

Metalaxyl; Chiral pesticide; Daphnia magna; Toxicity;

D O I：

10.1007/s00128-008-9567-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Chirality in pesticides has become a challenge because of enantiomers' different toxicities to non-target organisms. Acute and chronic toxicities of Rac-metalaxyl and R-metalaxyl to Daphnia magna were determined and compared. The 48-h LC50 for Rac- and R-metalaxyl to Daphnia magna were 51.5 and 41.9 mg/L. In a 14-day chronic test, the lowest-observed-effective concentration (LOEC) and no-observed-effective concentration (NOEC) of Rac-metalaxyl were 2 and 1 mg/L, respectively, whereas those of R-metalaxyl were 1 and 0.1 mg/L. Body length, days-to-first-brood and number of broods per female were significantly (p < 0.05) affected by R-metalaxyl at > 1.0 mg/L, but affected by Rac-metalaxyl at >= 2.0 mg/L.

引用

页码：531 / 534

页数：4

共 21 条

[1] Enantioselective degradation of metalaxyl in soils:: Chiral preference changes with soil pH [J].