Acute toxicity and bioconcentration of pyrimorph in zebrafish, Brachydanio rerio

• Published in: Pest management science Vol. 67; no. 9; pp. 1178 - 1183
• Main Authors: Zhao, Chunqing, Liu, Boqian, Wang, Jing, Li, Nan, Qin, Zhaohai, Qiu, Lihong
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.09.2011; Wiley; Wiley Subscription Services, Inc
• Subjects: Acrylamides - toxicity; acute toxicity; Agnatha. Pisces; Animal, plant and microbial ecology; Animals; Applied ecology; bioconcentration; Biological and medical sciences; Biological Assay - methods; Brachydanio; China; Danio rerio; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on vertebrates; Environmental impact; Freshwater; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; Fungicides, Industrial - toxicity; Herbicides; Lethal Dose 50; Morpholines - toxicity; Pest control; Phytopathology. Animal pests. Plant and forest protection; Phytophthora capsici; Phytophthora infestans; Pseudoperonospora cubensis; pyrimorph; QuEChERS; Rhizoctonia solani; Toxicity; Zebrafish; Zebrafish - growth & development; China; China, People's Rep; bioconcentration; Ecotoxicology; Extraction process; Toxicity; Pesticides; Multiresidue analysis; Fungicide; pyrimorph; Vertebrata; Residue; Pisces; acute toxicity; QuEChERS; zebrafish; Biological accumulation
• ISSN: 1526-498X; 1526-4998; 1526-4998
• DOI: 10.1002/ps.2198

BACKGROUND: Pyrimorph is a novel fungicide being developed in China that shows high antifungal activity against diseases caused by Phytophthora infestans, Phytophthora capsici, Rhizoctonia solani, Peronophythora litchi and Pseudoperonospora cubensis. Until now, no information on the toxicity of pyrimorph to untargeted organisms has been reported. To assess the potential environmental impacts of pyrimorph in fish, the acute toxicity and bioconcentration of pyrimorph in zebrafish were studied in this paper. RESULTS: When tested by the semi‐static method, the 48, 72 and 96 h median lethal concentration (LC50) values of pyrimorph to zebrafish were 24.33, 22.61 and 19.79 mg L−1 respectively. To study the bioconcentration of pyrimorph in zebrafish, the fish were exposed to sublethal concentrations of pyrimorph (2.00 and 0.25 mg L−1) for 192 h, a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method was applied to extract pyrimorph from samples and the residues of pyrimorph in the water and fish were determined by high‐performance liquid chromatography (HPLC). The highest bioconcentration factor (BCF) of pyrimorph in the fish was 1.07 × 102 (144 h) and 23.1 (96 h) after exposure to 2.00 and 0.25 mg L−1 of pyrimorph respectively. CONCLUSIONS: The novel fungicide pyrimorph has low toxicity to zebrafish; however, it showed medium BCF to zebrafish. Therefore, more attention should be paid to the residue of pyrimorph in fish, as well as to its long‐term ecological effects. Copyright © 2011 Society of Chemical Industry