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丁氟螨酯在蚯蚓体内的富集及其急性毒性.
- Source :
-
Chinese Journal of Pesticide Science / Nongyaoxue Xuebao . Feb2022, Vol. 24 Issue 1, p177-181. 5p. - Publication Year :
- 2022
-
Abstract
- The effect of cyflumetofen (CYF) on non-target organism earthworms (Eisenia fetida) in soil is unclear. In this study, a method was established for detection of CYF in earthworms. The samples were extracted with acetonitrile, the lipid in the earthworms was removed by liquid-liquid extraction, and then the concentration of CYF was detected by normal phase-HPLC. The results showed that the recoveries were 84%-88%, and the relative standard deviation was 1.3%-3.1% at the spiking levels of 0.5, 5, and 10 mg/kg, which verified the reliability of the method. According to the Biota-soil accumulation factor (BSAF), the enrichment concentration of the two enantiomers reached the maximum on the 7th day that the earthworms were enriched with CYF, and the enrichment ability of (+)-CYF in the earthworms was significantly higher than that of (−)-CYF. Long-term exposure of 0.5-10 mg/kg CYF for 28 days seriously inhibited the body weight of earthworms. The acute toxicity of cyflumetofen to earthworms was detected by filter paper method. The LC50 of rac-CYF, (−)-CYF, and (+)-CYF to earthworms was 162.5, 323.1 and 309.4 mg/L, respectively. According to the combined toxicity analysis, AI = −0.03 was obtained. The simultaneously use of the two enantiomers of CYF will cause additive toxicity to earthworms. [ABSTRACT FROM AUTHOR]
Details
- Language :
- Chinese
- ISSN :
- 10087303
- Volume :
- 24
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Chinese Journal of Pesticide Science / Nongyaoxue Xuebao
- Publication Type :
- Academic Journal
- Accession number :
- 155407469
- Full Text :
- https://doi.org/10.16801/j.issn.1008-7303.2021.0144