Effect of long-term application of pretilachlor on its persistence and residues in paddy crop.

摘要: ABSTRACTThe effect of long-term application pretilachlor to paddy in rice–wheat cropping system was investigated from 1997 2015. Additionally, 2013, field experiment also conducted where applied having no background its application. The residues were quantified using high-performance liquid chromatography (HPLC). average recoveries soil, grain and straw samples ranged 80.7% 93.8% HPLC with standard deviation less than 10%. dissipation rate soil followed first-order kinetics half-life 9.58 21.19 days. In 2015, compared gas chromatography–tandem mass spectrometry (GC–MS/MS) for quantification residues. Average GC–MS/MS 81.4% 98.3% Both offered high reproducibility; however GC–MS/MS...