Abstract
The establishment of preharvest residue limits (PHRLs) is important to minimize damage to producer and consumers caused by agricultural products which pesticide residue exceeds maximum residue limits (MRLs). Dissipation patterns of acrinathrin and metaflumizone in Aster scaber in greenhouse were studied during 10 days in order to determine a pre-harvest interval after application. Acrinathrin and metaflumizone were applied in two different greenhouse, located in Taean-gun (field 1) and Gwangyang-si (field 2). Samples were collected at 0, 1, 2, 3, 5, 7, and 10 days after insecticides application. The recoveries of two insecticides analyzed by LC–MS/MS and HPLC–DAD were ranged from 77.1 to 111.3%. The half-lives of acrinathrin and metaflumizone residues respectively were 3.8 and 5.9 days in field 1 and 9.2 and 4.5 days in field 2. The PHRLs 10 days before harvesting A. scaber were 0.610 mg/kg (field 1), 0.946 mg/kg (field 2) for acrinathrin, and 5.930 mg/kg (field 1), 5.147 mg/kg (field 2) for metaflumizone. This results can be used as basic data for the establishment of PHRL in A. scaber.
Highlights
Pesticides are very important resources in modern agriculture as their utilization for effective control of agricultural pests and weeds results in the increased productivity of cultivated crops [1, 2]
Efforts to mitigate the distribution and consumption of agri-foods exceeding the maximum residue limits (MRLs) of pesticide are being undertaken in Korea and other countries via the monitoring of pesticide residues in agricultural products distributed and imported for domestic consumption
This study aimed to obtain fundamental data for the establishment of Pre-harvest residue limit (PHRL) through the calculation of pesticide residue dissipation patterns by determining residues each days, after spraying A. scaber with acrinathrin and metaflumizone, which are insecticides used for eliminating the kanzawa spider mite and tobacco cutworm, respectively, during cultivation
Summary
Pesticides are very important resources in modern agriculture as their utilization for effective control of agricultural pests and weeds results in the increased productivity of cultivated crops [1, 2]. Efforts to mitigate the distribution and consumption of agri-foods exceeding the maximum residue limits (MRLs) of pesticide are being undertaken in Korea and other countries via the monitoring of pesticide residues in agricultural products distributed and imported for domestic consumption. The Korea Food and Drug Administration has expanded and systemized the monitoring of pesticide residues prior to shipment by establishing and applying a preharvest. This study aimed to obtain fundamental data for the establishment of PHRL through the calculation of pesticide residue dissipation patterns by determining residues each days, after spraying A. scaber with acrinathrin and metaflumizone, which are insecticides used for eliminating the kanzawa spider mite and tobacco cutworm, respectively, during cultivation
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