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Evaluation of the Leaching Potential of Anthranilamide Insecticides Through the Soil

Author:
Vela, Nuria, Pérez-Lucas, Gabriel, Navarro, María J., Garrido, Isabel, Fenoll, José, Navarro, Simón
Source:
Bulletin of environmental contamination and toxicology 2017 v.99 no.4 pp. 465-469
ISSN:
0007-4861
Subject:
Fluvisols, groundwater, half life, insecticides, leachates, leaching
Abstract:
The mobility of two relatively new antranilic diamide insecticides, cyanantraniliprole (CY) and cholantraniliprole (CH) in soil was examined, by means of disturbed columns loaded with a typical semiarid Mediterranean soil (Calcaric fluvisol) under laboratory conditions. Both insecticides appeared in leachates, with 52% of CY and 41% of CH of the initial mass added (1 µg g⁻¹) present. For CY, 21% and 19% were recovered from the upper and bottom layers of the soil, respectively, while for CH, 33% and 22% were recovered from the upper and bottom layers respectively. Based on the calculated half-lives (29 and 27 days for CY and CH, respectively) and their log K OC (about 2.5 for both), the calculated Groundwater Ubiquity Score (GUS) index was higher than 5 for both, indicating they have the potential to leach. Two transformation products, C₁₃H₉Cl₂N₂O (IN-ECD73) and C₁₉H₁₂BrClN₆O (IN-J9Z38) corresponding to the degradation of CH and CY, respectively were also identified and detected in leachates and soil.