Dissipation patterns of acrinathrin and metaflumizone in Aster scaber

Abstract

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 10days 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 10days 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 5.9days in field 1 and 9.2 and 4.5days in field 2. The PHRLs 10days before harvesting A. scaber were 0.610mg/kg (field 1), 0.946mg/kg (field 2) for acrinathrin, and 5.930mg/kg (field 1), 5.147mg/kg (field 2) for metaflumizone. This results can be used as basic data for the establishment of PHRL in A. scaber.