Removal of Pesticide Residues in Field-sprayed Leafy Vegetables by Different Washing Method

권혜영; 김택겸; 홍수명; 김찬섭; 백민경; 김두호; 손경애

The Korean Journal of Pesticide Science 17(4): 237-243


ISSN/ISBN: 1226-6183
Accession: 070460258

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Pesticides were sprayed on perilla leaf and leafy lettuce in a greenhouse and the reduction rate ofpesticide residues on each vegetable by washing were tested. The reduction rate of pesticide residues bywashing for 30 sec~3 min on perilla leaf were 3~63% in tap water, 2~58% in salt water, 6~74% in green teawater, and 8~86% in detergent solution. The detergent solution only showed significant difference inreduction rates compared to the tab water washing. Considering reduction effects of the washing duration, itwas showed that the reduction rates were a pattern of inclining as the duration of washing process increased,but there was no significant difference in the reduction rates except the reduction rates between washing inthe detergent solution for 1 min and 3 min. Comparing washing in flowing tab water and in stagnant tabwater with leafy lettuce, the reduction rate by one time washing were 8~68% in flowing tab water and7~64% in stagnant tab water. The water and the time used in this experiment were 17.5 L, 2.9 min withflowing tab water and 4 L, 1 min with stagnant tab water. The reduction rate by 3 times washing in stagnanttab water were 16.5~76.6%, and the water and the time used were 12 L, 3 min. Therefore, when the water and the time used to wash vegetables were considered, washing two or three times in stagnant tab watercould be more effective than washing one time in flowing tab water.