Persistence behaviour of thiamethoxam and lambda cyhalothrin in transplanted paddy.
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.
Barik
Suhrid Ranjan
SR
Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal, India.
Ganguly
Pritam
P
Kunda
Samir Kumar
SK
Kole
Ramen Kumar
RK
Bhattacharyya
Anjan
A
D004784:Environmental Monitoring; D007306:Insecticides / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D000073943:Neonicotinoids; D009570:Nitriles / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D009574:Nitro Compounds / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D012275:Oryza / Q000378:metabolism; D010078:Oxazines / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D011722:Pyrethrins / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D000077922:Thiamethoxam; D013844:Thiazoles / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism
D007306:Insecticides; D000073943:Neonicotinoids; D009570:Nitriles; D009574:Nitro Compounds; D010078:Oxazines; D011722:Pyrethrins; D012989:Soil Pollutants; D013844:Thiazoles; D000077922:Thiamethoxam; C037304:cyhalothrin