Abstract
Dissipation of β-cyfluthrin and imidacloprid was studied following three applications of a combination formulation of Solomon 300 OD (β-cyfluthrin 9% + imidacloprid 21%) @ 60 and 120 g a.i. ha−1 at 7 days interval. Samples of brinjal were collected at 0, 1, 3, 5, 7, 10 and 15 days after the last application and residues of β-cyfluthrin and imidacloprid were estimated on gas liquid chromatography (GLC) and high performance liquid chromatography (HPLC), respectively. Half-life periods for β-cyfluthrin were found to be 1.74 and 1.39 days and for imidacloprid these values were observed to be 2.31 and 2.18 days, respectively, at single and double the application rate. β-Cyfluthrin residues dissipated below the limit of quantification (LOQ) of 0.01 mg kg−1 after 5 and 7 days, respectively, at single and double the application dosages whereas imidacloprid residues took 10 days for both the dosages. Soil samples collected after 15 days after the last application did not show the presence of β-cyfluthrin and imidacloprid at their detection limit of 0.01 mg kg−1.
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Acknowledgments
The authors are thankful to Indian Council of Agricultural Research, New Delhi, India for sponsoring the project. Authors are also thankful to the Head, Department of Entomology, PAU, Ludhiana for providing research facilities.
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Mandal, K., Chahil, G.S., Sahoo, S.K. et al. Dissipation Kinetics of β-Cyfluthrin and Imidacloprid in Brinjal and Soil Under Subtropical Conditions of Punjab, India. Bull Environ Contam Toxicol 84, 225–229 (2010). https://doi.org/10.1007/s00128-009-9903-5
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DOI: https://doi.org/10.1007/s00128-009-9903-5