Effect of Light on the Degradation of Two Neonicotinoids viz Acetamiprid and Thiacloprid in Soil

• Published in: Bulletin of environmental contamination and toxicology Vol. 81; no. 2; pp. 185 - 189
• Main Authors: Gupta, Suman, Gajbhiye, V. T, Gupta, R. K
• Format: Journal Article
• Language: English
• Published: New York New York : Springer-Verlag 01.08.2008; Springer-Verlag; Springer Nature B.V
• Subjects: Aquatic Pollution; Biodegradation; Chromatography, High Pressure Liquid; Earth and Environmental Science; Ecotoxicology; Effects; Environment; Environmental Chemistry; Environmental Health; Field capacity; India; Insecticides - chemistry; Insecticides - radiation effects; Light; Neonicotinoids; Pesticide Residues - analysis; Pesticide Residues - radiation effects; Pesticides; Pollution; Pyridines - chemistry; Pyridines - radiation effects; Reference Standards; Soil Pollutants - chemistry; Soil Pollutants - radiation effects; Soil Science & Conservation; Soil treatment; Soils; Spectrophotometry, Ultraviolet; Studies; Sunlight; Thiazines - chemistry; Thiazines - radiation effects; Thin films; Ultraviolet radiation; Ultraviolet Rays; Waste Water Technology; Water Management; Water Pollution Control; Acetamiprid; Soil; Sunlight; Ultra violet light; Thiacloprid; Dissipation
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-008-9405-x

Persistence of two neonicotinoids viz thiacloprid and acetamiprid in soil as affected by UV and sunlight exposure was studied. Treated soil was placed in petri-plates, brought to field capacity moisture and then exposed to UV and sunlight. Dissipation for both the pesticides followed monophasic first order kinetics under sunlight, however under UV-light biphasic dissipation was recorded. Residues of acetamiprid and thiacloprid in soil dissipated with half-lives of 11.1 and 12.8 days under UV light and 25.1 and 19.1 days under sunlight, respectively. Residues of both the neonicotinoids dissipated quickly under UV light as compared to sunlight. Exposure of thin film of acetamiprid and thiacloprid to UV and sunlight revealed that acetamiprid is more photo labile than thiacloprid. More than 95% acetamiprid dissipated within 24 h as compared to ~70% dissipation observed for thiacloprid.