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Establishment of Pre-Harvest Residue Limits (PHRLs) of Fluopicolide and Metrafenone in Cherry Tomato (Lycopersicon esculentum Mill.)
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 Title & Authors
Establishment of Pre-Harvest Residue Limits (PHRLs) of Fluopicolide and Metrafenone in Cherry Tomato (Lycopersicon esculentum Mill.)
Hur, Kyung Jin; Woo, Min Ji; Kim, Ji Yoon; Saravanan, Manoharan; Kwon, Chan-Hyeok; Son, Yong Wook; Hur, Jang Hyun;
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 Abstract
BACKGROUND: The present investigation was aimed to predict the pre-harvest residue limits (PHRLs) of the fluopicolide and metrafenone on cherry tomato and to estimate their half-life and characteristics of the residues.METHODS AND RESULTS: Pesticides were treated once on cherry tomato in field 1 and 2 under the standard application rate. The samples were collected 7 times at the end of 0(2 hours after pesticides spaying), 1, 2, 3, 5, 7 and 10 days before harvest. Residues of fluopicolide and metrafenone were analyzed by the LC-MS/MS. In this study, the method limit of quantification (MLOQ) for both fluopicolide and metrafenone in cherry tomato was found to be 0.005 mg kg-1. Their recovery levels were 92.7∼94.8% and 82.6∼88.0%, shown with coefficient of variation of less than 10%. Half-life of fluopicolide and metrafenone in field 1 and 2 were found to be 15.0 days and 12.8 days, 18.9 days and 21.5 days, respectively.CONCLUSION: Based on the results, this study shows the level of PHRL on cherry tomato is 0.27 mg/kg for fluopicolide and 2.29 mg/kg for metrafenone at 10 days before harvesting. The present study indicates the residues of both pesticides on cherry tomato will be below maximum residue limit (MRL) at harvest.
 Keywords
Cherry tomato;Fluopicolide;Metrafenone;Pre-harvest residue limits (PHRLs);
 Language
Korean
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