摘要： 为评价高效氯氟氰菊酯在不同生态环境苹果园的降解行为。在昆明、北京和太原进行田间试验。结果表明,高效氯氟氰菊酯在苹果及土壤中的降解符合一级动力学消解模式,苹果中降解半衰期为17.8～24.0 d,土壤中半衰期为12.1～15.8 d。苹果和土壤中最终残留量分别是0.015～0.051 mg/kg,﹤0.01～0.027 mg/kg,低于我国规定的最高残留限量(MRL值)0.2 mg/kg。三地的气候条件和土壤理化性质有差异,但高效氯氟氰菊酯在苹果和土壤中的降解行为基本一致。在不同环境苹果园使用高效氯氟氰菊酯,其残留对苹果的安全质量不会造成影响。

关键词: 高效氯氟氰菊酯, 苹果, 土壤, 残留

Abstract: In order to assess degradation trends of lambda-cyhalothrin in different kinds of eco-environment planted apple.The field trail were conducted in suburbs of Taiyuan,Kunming and Beijing city,the apples and soils were analyzed by gas chromatography with ECD detector.The result showed that the degradation behaviors of lambda-cyhalothrin accorded with first order kinetics,the half life were from 17.8 to 24.0 days in apple,12.1 to 15.8 days in soil respectively.The last application was done 21 days before harvesting,the residues in apple and soil were not more than 0.2 mg/kg that was the maximum residues limits.The rate of degradation in three sites related to the air temperature and soils characteristic of physics and chemistry,but the difference was not significant.so it is safe to apply lambda-cyhalothrin.

Key words: Lambda-cyhalothrin, Apple, Soil, Residues

中图分类号: 

• S661.1