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In order to study the residual amounts of absorbed organochlorine pesticides in vegetables, heptachlor and endrin were sprayed 2,4 and 6kg per 10a., respectively, before sowing the seeds in the station. The experimental study is primarily concerned with the absorption in lettuce and garland chrysanthemum. The absorption of each pesticide into lettuce and garland chrysanthemum, and residual pesticides in soil by time have been analyzed by the gas chromatographic method, and the ratio of residual pesticides in vegetablesand soil were estimated. Heptachlor, heptachlor epoxide and endrin in lettuce and garland chrysanthemum at the market in Seoul area have also analyzed and found extremely low level of pesticides in comparison with the level in above experimental vegetables as well as the same vegetables in Japan.
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