Investigating Role of Abiotic Factors on Spinosad Dissipation.
The effect of abiotic factors on dissipation of spinosad (soil moisture regimes, pH, and light) was studied. Spinosad residues were estimated using high performance liquid chromatography fitted with a UV detector. Under laboratory conditions, half-lives of spinosad were 9.0 and 7.7 days for air dried and field capacity soils, respectively. Percent dissipation of spinosad after 30 days was 47.02, 22.35, 62.5, 68.23 and 76.47 in solution with an aqueous pH of 10.85, 9.15, 6.97, 3.90 and 2.04, respectively. The half-life of spinosad in UV and sunlight was only 1.6 and 5.2 h, respectively. Light, especially the UV component, is an important factor for degradation of spinosad compared to other abiotic conditions.
Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, India.|Central Rice Research Institute, Cuttack, Odisha, 753006, India.
Totan
T
Adak
Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, India. mukrj_irani@yahoo.com.
Irani
I
Mukherjee
D002851:Chromatography, High Pressure Liquid; D004338:Drug Combinations; D006207:Half-Life; D006863:Hydrogen-Ion Concentration; D007306:Insecticides / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D018942:Macrolides / Q000737:chemistry* / Q000528:radiation effects; D012987:Soil; D012989:Soil Pollutants / Q000737:chemistry* / Q000528:radiation effects; D013472:Sunlight
D004338:Drug Combinations; D007306:Insecticides; D018942:Macrolides; D012987:Soil; D012989:Soil Pollutants; C415329:spinosad
HPLC; Half-life; Moisture; UV light; pH