PERSISTENCE OF PRETILACHLOR, PENOXSULAM AND PYRAZOSULFURON HERBICIDES IN SOIL

ANIL NAGWANSHI¹*, A.K. DWIVEDI², SHOBHA SONDHIA³, ROHIT PANDEY^4
1Department of Soil Science and Agricultural Chemistry, J.N.K.V.V., Jabalpur, India
²Department of Soil Science and Agricultural Chemistry, J.N.K.V.V., Jabalpur, India
³Directorate of Weed Science Research, ICAR, Jabalpur, India
⁴Department of Soil Science and Agricultural Chemistry, J.N.K.V.V., Jabalpur, India
* Corresponding Author : anil_nag22@yahoo.com

Received : 17-02-2016     Accepted : 24-02-2016     Published : 14-03-2016
Volume : 8     Issue : 8       Pages : 1087 - 1089
Int J Agr Sci 8.8 (2016):1087-1089

Keywords : Persistence, Pretilachlor, Penoxsulam, Pyrazosulfuron
Academic Editor : Arpit Suryawanshi, Brajesh Kumar Namdev, Haridarshan Chouksey
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

An experiment was conducted during Kharif season of 2012-2013 at experimental farm of Directorate of Weed Science Research, Jabalpur. The treatments included application of various herbicides applied to paddy crop @ pretilachlor 750 g a.i. ha -1, penoxsulam 25 g a.i. ha-1, and pyrazosulfuron 25 g a.i. ha-1 and weedy and hand weeding. The study was aimed to evaluate the pattern of dissipation, persistence and residue in soil at harvest. As regarded to the observation on persistence residue and dissipation study reveals that higher content of residue was found in sample taken at initially as well as during growth period with an interval of 5 days exhibited successive depletion of herbicidal residue with progressive growth of the crop till harvest. HPLC method for detection for persistence residue and dissipation indicated that a first order kinetics was followed and the average half life values ranged for pretilachlor (750 g a.i. ha-1), penoxsulam (25 g a.i. ha-1), and pyrazosulfuron (25 g a.i. ha-1) were 15.06, 26.65 and 24.75 days respectively.