Acute Toxicity Evaluation of 20% Fenoxycarb Water Dispersible Granules on Three Aquatic Organisms
Abstract：To evaluate the safety of the herbicide fenoxycarb to aquatic organisms, the static method from the chemical pesticide safety evaluation method was used to determine the acute toxicity of 20% fenoxycarb water dispersible granules on three aquatic organisms: zebrafish, Daphnia magna, and Chlorella near-oculata. The results showed that, based on measured concentrations, the 96 h-LC50 of 20% fenoxycarb water dispersible granules for zebrafish was 120 mg a.i./L, with a 95% confidence interval of 108–133 mg a.i./L; the 48 h-EC50 for Daphnia magna was 36.0 mg a.i./L, with a 95% confidence interval of 28.2–46.1 mg a.i./L; the 72 h-ErC50 for Chlorella near-oculata was 2.72 mg a.i./L, with a 95% confidence interval of 2.29–3.29 mg a.i./L, and the 72 h-EyC50 was 0.72 mg a.i./L, with a 95% confidence interval of 0.31–1.11 mg a.i./L. According to the 'Guidelines for Environmental Safety Evaluation of Chemical Pesticides', it was determined that 20% fenoxycarb water dispersible granules were low toxicity to zebrafish and Daphnia magna, and moderate toxicity to Chlorella near-oculata.
Keywords：FenoxycarbZebrafishDaphnia magnaChlorella near-oculataAcute toxicityHigh-performance liquid chromatography analysis
Publication Date：2025-10-15
Online Publishing Date：2025-11-07(First online date of this platform, not the publication date of the document)
Pages：6( 24-29 )