RESIDUAL FATE OF HERBICIDE FLUMIOXAZIN 50 SC IN/ON WHEATManojit Ghosh, PabitraKumar Biswas, Mahua Banerjee, Ganesh Chandra Malik and Sujay Kumar Paul
The persistence behaviour of Flumioxazinin wheat were investigated at Chella, Kamarpara, Illambazar, Birbhum, West Bengal, during two consecutive season of 2013-14 and 2014-15. Extraction of the herbicides was performed with acetonitrile followed by dispersive Solid Phase Extraction (d-SPE) clean up with Primary Secondary Amine (PSA: Varian, Harbor City, CA; 40 mm particle size), Florisil (60â100 mesh; Acros, Geel, Belgium) and Graphitized Carbon Black (GCB; United Chemical Technology, Bellefonte, PA: only for plant matrixes). The residue of Flumioxazin were quantified by Liquid Chromatography-mass Spectrometry using multiple reactions monitoring (MRM). The half-life of Flumioxazin was found in the range of 2.59- 2.79 days and 3.86-4.93 days for wheat plant and soil respectively. No residue of Flumioxazin was detected in harvest plant sample and soil. It appears from this study that, application of Flumioxazin will not pose any residual toxicity problem when applied in recommended doses.