Import Tolerance 설정을 위한 꽃받침포함 딸기 중 Flonicamid와 대사산물의 잔류성

Pre-harvest interval and decline pattern of flonicamid, TFNG and TFNA were determined in strawberry with calyx using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The study was carried out to propose import tolerance for export promotion of strawberry to Taiwan by using OECD maximum residue limit (MRL) calculator. The residue field trials for flonicamid (50%, SG, insecticide) were carried out as decline tests in the three independent sites to cultivate strawberry. The flonicamid (50%, SG) of test substance was diluted 10,000 times and the 0.00764 kg a.i./10 a of flonicamid 50% SG was applied for the sites two times at 7-day intervals. Sampling was carried out 0, 1, 3, 5, 7, 14, 21, 28, 35 and 45 days after the final application of flonicamid (50%, SG), and untreated control samples were collected prior to the sampling of treated plots. The residual amount of flonicamid included with TFNG and TFNA presented 0.06∼1.40 mg/kg in site 1 (Sacheon), 0.06∼0.82 mg/kg in site 2 (Gokseong) and 0.18∼1.15 mg/kg in site 3 (Nonsan), respectively, in the strawberry with calyx for three decline test. In cThe import tolerance of flonicamid for strawberry with calyx may be recommended at 3.0 mg/kg in Taiwan by the OECD MRL calculator.