Risk Assessment of Pesticide Residues in Watermelon
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Abstract:
To clarify the types, residual risk levels and recommended maximum residue limit of pesticide residues in watermelon, 422 watermelon samples obtained from Shandong, Xinjiang, Hainan and Guangxi in 2018 and 2019 were taken as the research objects for quantitative analysis of 60 kinds of pesticide residues. Then, the dietary risks of residual pesticides, types of residual pesticides with relatively high risks, and the maximum residue limits were analyzed and discussed based on assessments of acute and chronic dietary intake risks, risk ranking and estimated maximum residue limits of pesticides. The results showed that there were a total of 18 kinds of pesticide residues, and among which pyrimethanil, carbendazim, acetamiprid and dimethomorph had relatively high proportions (18.25%, 16.59%, 14.22% and 13.27%, respectively); the %ADI and %ARfD of pesticide residues ranged in 0.0000%~0.0112% and 0.1191%~39.7521%, respectively (which were much lower than 100%); The three pesticides, emamectin benzoate, pyridaben, triazophos, had relatively high risk scores (which were 24.02, 24.02 and 24.12, respectively); the maximum residue limits of 9 kinds of residual pesticides have not yet been established, and 8 pesticides met the established maximum residue limits. Among which, imidacloprid and triazophos residues exhibited relatively high residue risks and had no maximum residue limits, and their recommended maximum residue values were 1 and 0.02 mg•kg-1, respectively. The above analyses revealed that there were pesticides residues in the samples, but the residual dietary risks were within the safety limits. It is recommended to speed up the establishment of maximum residue limits for imidacloprid and triazophos in watermelon.
