시설재배 딸기의 생산단계에서 살충제 잔류량에 따른 반감기 및 감소상수 산출에 의한 안전성 평가

• Published in: Hanguk hwangyeong nonghak hoeji Vol. 39; no. 2; pp. 122 - 129
• Main Authors: 장희라, Hee-ra Chang, 유정선, Jung-sun You, 반선우, Sun-woo Ban
• Format: Journal Article
• Language: Korean
• Published: 한국환경농학회 30.06.2020
• Subjects: Dissipation; Insecticides; Pre-harvest; Residue; Strawberry; 농학; Insecticides; Pre-harvest; Residue; Strawberry; Dissipation
• ISSN: 1225-3537; 2233-4173
• DOI: 10.5338/KJEA.2020.39.2.16

BACKGROUND: Dissipation patterns of insecticides (acequinocyl, clothianidin, diflubenzuron, thiacloprid, and thiamethoxam) on strawberry grown in plastic-covered greenhouse were evaluated at 7 intervals including the preharvest interval after application. This study was performed to determine the residue concentrations, half-lives and dissipation rates in strawberry for the harvest periods. METHODS AND RESULTS: Acequinocyl, clothianidin, diflubenzuron, thiacloprid, and thiamethoxam were applied in accordance with critical good agricultural practices for strawberry. Strawberry samples were collected at 0, 1, 2, 3, 5, 7 and 10 days after application. Quantitaion was performed by HPLC/DAD and HPLC-MSMS system with C18 column. The limit of quantitation (LOQ) values varied between were 0.00025~0.05 mg/kg on strawberry. The recoveries of acequinocyl, clothianidin, diflubenzuron, thiacloprid and thiamethoxam at two concentrations ranged from 70.9~ 104.9% on strawberry. The half-lives of pesticide dissipation on strawberry for two fields ranged from 1.3~8.2 days. The dissipation rates were evaluated according to the statistics method with a 95% confidence. CONCLUSION: The residue levels of insecticides (acequinocyl, clothianidin, diflubenzuron, thiacloprid, and thiamethoxam) on strawberry at 0-day after application were below the specified values by Korean MRL. To estimate dissipation rate constant of pesticides on crop for harvest periods, it is important to set the pre-harvest residue limit for human health and consumer protection in Korea.