1Department of Chemistry, College of Basic Sciences and Humanities
2Department of Soil Science, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, US Nagar, 263 145, Uttarakhand, India
*Corresponding author E-mail: anj612003@yahoo.co.in
Online published on 5 January, 2016.
Efficacy of the soil amendments cereal straw (CS) and fresh cow dung (FCD) in reducing fipronil residues in soil, groundwater and rice crop under the sub-tropical field conditions is reported. The fipronil 0.3 G was applied at the rate of 25g a.i.ha−1 and its residues were analysed using HPLC. Although both the amendments were helpful in reducing leaching of fipronil to groundwater as compared to the control, FCD was more effective with lesser leaching of the pesticide. The residues of the pesticide were detected in soil, water and straw but were within the recommended limits (MRL: 0.01 to 0.2 μg g−1 in different commodities). In rice grains, the level of fipronil residues was below detection limit (<0.002 μg g−1).
Fipronil, soil amendment, groundwater, rice
