Effect of Abiotic Factors on Degradation of Imidacloprid
2017
Mahapatra, Bibhab | Adak, Totan | Patil, Naveen K. B. | Pandi, G. Guru P. | Gowda, G Basana | Yadav, Manoj Kumar | Mohapatra, S. D. | Rath, Purnachandra | Munda, Sushmita | Jena, Mayabini
The role of soil moisture, light and pH on imidacloprid dissipation was investigated. A high performance liquid chromatography (HPLC) based method was developed to quantify imidacloprid present in soil with a recovery of more than 82%. Rate of dissipation of imidacloprid from soil was faster in submerged condition compared to field capacity and air dried condition. Imidacloprid dissipated non-significantly between sterile and non-sterile soils, but at field capacity, the dissipation was faster in non-sterile soil compared to sterile soil after 60 days of incubation. Similarly, under submergence, the dissipation of imidacloprid was 66.2% and 79.8% of the initial in sterile and non-sterile soils, respectively. Imidacloprid was rather stable in acidic and neutral water but was prone to photo-degradation. Therefore, imidacloprid degradation will be faster under direct sunlight and at higher soil moisture.
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