Department of Chemistry and Physics, CCS Haryana Agricultural University, Hisar-125 004, Haryana, India
*Corresponding author E-mail: beena@hau.ernet.in
Online published on 2 July, 2014.
Persistence of fipronil in soil under chilli crop by applying commercial formulation of fipronil (Regent 5 SC) @ 50 and 100 g a.i. ha−1 in field is reported. Soil samples drawn periodically at 0 (1h), 1, 3, 5, 7, 10, 15, 20 and 30 days of treatment were analyzed by GC-ECD equipped with capillary column. The residues of fipronil at both the doses dissipated by almost 80% in 30 days. Desulfinyl, sulfone and sulfide dissipated almost 90% in 15 days. Half-life ranged from 5–5.5 days in case of fipronil alone and 2.6 to 2.9 days for fipronil and its metabolites in soil at the two test doses.
Fipronil, metabolites, soil, residues, half-life
