Persistence Behaviour of Thiamethoxam and Lambda Cyhalothrin in Transplanted Paddy

• DOI: 10.1007/s00128-010-0101-2
• Publication Date: 2010-08-11T03:28:54Z
• Authors: Suhrid Ranjan Barik; Pritam Ganguly; Samir Kumar Kunda; Ramen Kumar Kole; Anjan Bhattacharyya
• Keywords: Cyhalothrin; Kharif crop; Residue (chemistry); Paddy field

A field study was conducted in Pre-Kharif season 2007 on paddy to determine the persistence of thiamethoxam (12.6%) and lambda cyhalothrin (9.4%) [in a 'Readymix' formulation Alika 247 ZC], following the application of 33 g. a.i. ha⁻¹ (T₁) and 66 g. a.i. ha⁻¹ (T₂). Spraying of insecticide was done during milking stage of the crop (63 days after transplantation). Thiamethoxam and lambda cyhalothrin residues were estimated by HPLC and GLC respectively. The half-life values were 5.2-5.8 and 4.8 days for thiamethoxam and lambda cyhalothrin respectively. No residue was detected in the harvested paddy, straw, grain, and soil samples.