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민필기,민용규 충북대학교 농업과학기술연구소 1998 農業科學硏究 Vol.15 No.-
Chlorothalonil, procymidone, deltamethrin and benomyl were selected for this investigation among pesticides, the maximum residue limits of which were already established. Each sample was classified as group A, B, and C, and sprayed with different concentrations. The changes in pesticide residues at different concentrations and with lapse of time were investigated. The results are as follows : 1.The pesticide residues rapidly decreased 5 days after spray but decreased slowly with lapse of time. 2.The residue level of benomyl decreased abruptly from 23.93 to 0.00 ppm with time, whereas those of chlorothalonil, procymidone, and deltamethrin reduced from 16.73 to 0.09 ppm, from 13.23 to 0.15 ppm, and from 7.17 to 0.06 ppm, respectively. 3.Higher levels of pesticide residues were detected in dried red pepper than in unripe-fresh red pepper and more residues were present in sun-dried samples than in oven-dried ones, with the exception of deltamethrin. 4.The periods of time when the residual amounts of chlorothalonil, procymidone, deltamethrin and benomyl were below the respective maximum residue limits (MRL) were 9, 1, 11 and 3 days, respectively, after the spraying of the recommended amount of each chemical. However, the actual amounts of pesticides taken up by humans in daily life would be very small, since about 90% of the residues would probably be removed during the washing process.