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Suggestion for Establishment of Temporary MRLs and Safe use Guideline of the Organophosphorus Insecticides in Jinpi
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Suggestion for Establishment of Temporary MRLs and Safe use Guideline of the Organophosphorus Insecticides in Jinpi
Lee, Ju-Hee; Shin, Kab-Sik; Jeon, Young-Hwan; Kim, Hyo-Young; Hwang, Jeong-In; Lee, Byung-Hee; Kang, In-Hoo; Kang, Shin-Jung; Kim, Tae-Hwa; Kim, Jang-Eok;
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Jinpi(Aurantii nobilis Pericarpium) is one of the most important material of oriental herbal medicine which is made from the peel of mandarin by washing with hot water and drying. Pesticides have necessarily used for mandarin cultivation according to their preharvest intervals (PHIs) but their maximum residue limits (MRLs) and PHIs for Jinpi are not established yet. This study is to know residue amount of organophosphorus insecticides in Jinpi and to establish the MRLs and PHIs for fenitrothion and phenthoate in Jinpi. Fenitrothion was sprayed once, twice and three times with 7 days interval before harvest. Its residue amount ranged from 0.14 to 1.17 mg/kg in mandarin, 0.59 to 4.02 mg/kg in its peel and 1.66 to 22.38 mg/kg in Jinpi. In case of phenthoate, it was sprayed with 10 days interval for 10 days before harvest. Its residue amounts in mandarin, its peel, and Jinpi ranged from 0.16 to 0.65, 0.69 to 2.41 and 1.69 to 11.3 mg/kg, repectively. Proposed MRLs of fenitrothion and phenthoate for Jinpi are suggested to 22.39 and 11.30 mg/kg, respectively. So we recommend PHIs of the pesticides that fenitrothion can be sprayed 3 times 7 days before harvest and in case of phenthoate, sprayed 3 times 10 days before harvest.
Fenitrothion;Jinpi;Mandarin;MRL;Phenthoate;Preharvest interval (PHI);
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