Monitoring of the residues of some pesticides in mulberry leaves and their safety evaluation

뽕잎중 잔류농약의 monitoring 및 안전성 평가

  • Lee, Jae-Koo (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Kwon, Jeong-Wook (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Ahn, Ki-Chang (Department of Agricultural Chemistry, Chungbuk National University) ;
  • Moon, Jae-Yu (Department of Natural Fiber, Seoul National University)
  • 이재구 (충북대학교 농과대학 농화학과) ;
  • 권정욱 (충북대학교 농과대학 농화학과) ;
  • 안기창 (충북대학교 농과대학 농화학과) ;
  • 문재유 (서울대학교 농업생명과학대학 천연섬유학과)
  • Published : 1998.09.30

Abstract

In order to evaluate the safety of mulberry leaves for sericultural purpose to the contamination by pesticide residues, the analyses of dichlorvos, acephate, phenthoate, pyrazophos, deltamethrin, and cypermethrin were done for 24 samples collected in spring and fall over two consecutive years (1996 and 1997), each, from 8 provinces across the country, by selecting three representative farmhouses in each province. In spring samples of 1996, the residual amounts of dichlorvos, acephate, and phenthoate were $0.018{\sim}0.032$, $0.013{\sim}0.072$, and 0.051 ppm, respectively, whereas, pyrazophos was not detected, and the detection frequencies were 29, 58, and 4%, respectively. In fall samples, on the other hand, those of the above pesticides were $0.012{\sim}0.048$, $0.020{\sim}0.156$, and $0.018{\sim}0.050$ ppm, respectively, and pyrazophos was not detected either and the detection frequencies were 42, 17, and 13%, respectively. While in spring samples of 1997, the residual amounts of dichlorvos, acephate, and cypermethrin were $0.014{\sim}0.064$, $0.033{\sim}0.061$, and $0.019{\sim}0.068$ ppm, respectively, and deltamethrin was not detected. The detection frequencies were 75, 13, and 8%, respectively. In fall samples, on the other hand, those of the above pesticides were $0.013{\sim}0.062$, 0.015, and $0.009{\sim}0.013$ ppm, respectively, and deltamethrin was not detected either. The detection frequencies were 88, 4, and 17%, respectively. Almost all of the samples turned out to be non-toxic to silkworms, except that one sample (No. 10, spring 1997) contaminated by a high concentration of cypermethrin (0.068 ppm) was judged to do harm to silkworms. In the GC analyses, the selection of columns, the change in column temperature, and the use of MSD made the separation and identification of the vague compounds possible.