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Dissipation of Insecticide Metaflumizone, Chlorantraniliprole, Spinetoram, and Etofenprox in Ssam Cabbages during Cultivation : 엇갈이배추의 재배 중 살충제 Metaflumizone, Chlorantraniliprole, Spinetoram, 및 Etofenprox의 소실 양상

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Authors

백수진

Advisor
김정한
Major
농업생명과학대학 농생명공학부
Issue Date
2018-08
Publisher
서울대학교 대학원
Description
학위논문 (석사)-- 서울대학교 대학원 : 농업생명과학대학 농생명공학부, 2018. 8. 김정한.
Abstract
The metaflumizone, chlorantraniliprole, spinetoram and etofenprox of insecticides are registered in Korean cabbages(head) for control the striped flea beetle. This study was conducted with residual characteristic of these insecticides to obtain baseline data on pesticide registration and guidelines on safe use of pesticides in minor crop Korea cabbages (Brassica leafy vegetables). Metaflumizone, etofenprox in emulsifiable concentrate (EC) formula and Spintoram, Chlorantraniliprole in water dispersible granule formulation were treated with 4 plots (30/21 days, 21/14 days, 14/7 days, 7/0 days) on Korean cabbage. Metaflumizone, chlorantraniliprole and spinetoram were quantitative analyzed by liquid chromography-tandem mass spectrometry in the ESI (electrospray ionization) positive mode using MRM. Etofenprox was analyzed by HPLC equipped DAD. These insecticides of MLOQ were satisfied 0.01 – 0.02 mg/kg and the calibration curve coefficient (r2) was ≧0.99 in the calibration range of 5-100 ng/mL using matrix matched method (metaflumizone, chloratraniliproe and etofenprox). For recoveries, metaflumizone and chlorantraniliprole and spinetoram conventional methods were used for the analysis, spinetoram was used QuEChERS method. Infield sample, the residual amount of metaflumizone and spinetoram was calculated as the sum. The maximum residues in Korean cabbages were measured from 0.15 to 4.17 mg/kg (metaflumizone), 0.05 to 0.95 mg/kg (chlorantraniliprole), <0.01 to 0.41 mg/kg (spinetoram) and 0.49 to 18.90 mg/kg (etofenprox). In Korea, these pesticides were established as below the 1.0 - 3.0 mg/kg of MRLs in the Korean cabbages.All pesticides showed a tendency to decrease over the time. Based on these data, this study provides that metaflumizone, chlorantraniliprole, spinetoram and etofenprox is suitable to apply for Korean cabbage under recommended dosage as the PHI.
Language
English
URI
https://hdl.handle.net/10371/143779
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