In order to explore the residual digestion characteristics of emamectin benzoate on pepper applied by the powder method,this experiment adopted a powder machine to apply emamectin benzoate on the peppers grown in the greenhouse,and collected pepper samples at different time points after application.Meanwhile,ultra-high performance liquid chromatography-tandem mass spectrometry was established to determine the residual emamectin benzoate in pepper plants.The results showed that the residue degradation of emamectin benzoate on pepper was subject to the first-order reaction kinetics,and the half-life of emamectin benzoate on pepper was 2.3 d.The final residue of emamectin benzoate in pepper collected 5 d after application met the quality and safety standard.This study provided a reference for the pesticide residual safety after the use of powder method in the production of pepper in the facility.
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