An analytical method using Qu ECh ERS extraction and GC-MS / MS( gas chromatography coupled with tandem mass spectrometry) was established for analysis of myclobutanil residues in cowpea and soil of the field,and initial deposition and degradation dynamics of myclobutanil in cowpea and soil of the field was also investigated in a field experiment.Results show that response value of the instrument was in linear relationship with concentration of myclobutanil in the range of 0. 001-2 mg·kg-1,and LOD of the in...