김영은¹, 윤지현², 임다정³, 김선욱⁴, 조현정⁵, 신병곤⁶, 김효영⁷, 김인선^{8 *}

BACKGROUND : Pesticide uptake by a rotational crop after being used for the primary crop is a potential cause of violation against the pesticide law if the pesticide is not registered in the secondary crop. The evaluation of pesticide residues is needed to comply with the law in the rotational crop cultivation. This study was conducted to investigate the plant back interval (PBI) of fluopyram for the rotational cultivation of radish under greenhouse conditions.
METHODS AND RESULTS : To investigate the PBI of fluopyram, two experimental approaches were employed based on the evaluation of residues in radish cultivated successively in soil 16 days after treated with fluopyram onto pepper plant (T1) and in radish cultivated in bare soil treated with fluopyram at PBI 30 and PBI 60 days (T2). A modified QuEChERS method coupled with LC/MS/MS analysis was employed to determine fluopyram in the samples. Good linearity of matrix-matched standard calibration of fluopyram were observed with the coefficient values of determination greater than 0.995. Recovery values of fluoryram fortified in the control samples at levels of 0.01, 0.05, 0.1 and 0.25 mg/kg ranged from average 84.9 to 117.6% with RSD less than 10%. Fluopyram residues in radish harvested from T1 and T2 were found as levels less than maximum residue limit.
CONCLUSION: This study suggests 20~30 days as the PBI of fluopyram for the rotational cultivation of radish in the greenhouse soil treated with fluopyram used for pepper as the primary crop.

04-(99-107) DOI-12번-김인선 외7_(9p) (2).pdf