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  • Title: Dissipation and residues of the diamide insecticide chlorantraniliprole in ginseng ecosystems under different cultivation environments.
    Author: Lu Z, Fang N, Liu Y, Zhang Z, Pan H, Hou Z, Li Y, Lu Z.
    Journal: Environ Monit Assess; 2017 Oct 02; 189(11):534. PubMed ID: 28971277.
    Abstract:
    Ginseng is a valuable herb, the roots of which have been consumed for medicinal use since ancient times in Asian countries. Currently, its cultivation in China is conducted in either forests or non-forest areas. In this study, we investigated the dissipation and residues of the diamide insecticide chlorantraniliprole (CAP) in ginseng ecosystems in these two cultivation environments. The half-life of CAP in ginseng leaves was calculated to be 16.5 days in non-forest areas and 23.9 days in forests, while the half-life of CAP in the soil under non-forest and forest cultivation was 33.0 and 53.3 days, respectively. The relatively long persistence of CAP in ginseng leaves and soil could be attributed to the unique cultivation techniques of ginseng, which prevents exposure to direct sunlight irradiation and rainfall. The residual amounts of CAP in ginseng leaves, roots, and soil in non-forest areas were 0.168, 0.011, and 0.013 mg kg-1 21 days after CAP application at the maximum label-allowed dosage and frequency versus 0.564, 0.013, and < 0.005 mg kg-1 in forests. CAP application strategies for the control of Lepidoptera pests such as armyworms, and the safety of harvested ginseng roots are recommended for ginseng cultivated in forests and non-forest areas based on the results of the CAP residue experiments.
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