Abstract
The experiment developed the ultra-high-performance liquid chromatography–tandem mass spectrometry (UPLC/MS/MS) method for testing emamectin benzoate, and studied the metabolism of emamectin benzoate in rice plants and rice-growing environments via application of this testing method. The dissipation curve of emamectin benzoate standard substance was good at 0.5–200 μg L−1, and its correlation coefficient was greater than 0.99. In the concentration range of 0.1–50 μg kg−1, the average recovery rate of plants, soil, and field water was 82 %–102 %, and relative standard deviation (RSD) was between 0.3 % and 15.9 %. Half-lives in rice plants and soil were 0.8–2.8 days and 1.9–3.8 days, respectively, and emamectin benzoate was not detected in rice or rice hull. The experiment showed that emamectin benzoate is harmless to human health at the concentration recommended by the manufacturer.
Highlights
Emamectin benzoate is a kind of macrolide compound made by modifying the chemical structure of the raw material, avermectin B1, and is a novel and efficient semi-synthetic pesticide [1]
Research has shown that if rats are exposed to high doses of emamectin benzoate during pregnancy and lactation, the offspring display significant neurotoxicity, which indicates that the neurotoxic effect of emamectin benzoate is prominent in animals [4]
Other reports have shown that the LD50 of emamectin benzoate to bees, quail, Bombyx mori, and zebrafish is very low [5,6,7], which indicates that emamectin benzoate is highly toxic or highly toxic to these organisms
Summary
Emamectin benzoate is a kind of macrolide compound made by modifying the chemical structure of the raw material, avermectin B1, and is a novel and efficient semi-synthetic pesticide [1] It is neurotoxic, and has a significant control effect on Lepidoptera, Homoptera, Coleoptera, and other pests [2,3]. Other reports have shown that the LD50 of emamectin benzoate to bees, quail, Bombyx mori, and zebrafish is very low [5,6,7], which indicates that emamectin benzoate is highly toxic or highly toxic to these organisms. Krogh [18] reported the detection of avermectin drugs in water, sediment, and soilinusing Insoil this using research, a simple, relatively and efficient for the residue analysis of method for the residue analysis of emamectin benzoate was developed.
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