关键词: 菜用大豆, 敌敌畏, 丙溴磷, 丁草胺, 安全间隔期, 使用技术

Abstract: By the methods of gas chromatography and the field demonstration experiments,and according to the Maximum Residue Limit (MRL) of dichlorvos,profenofos and butachlor of GB2763-2005,Japan and European Union,the securities of dichlorvos,profenofos and butachlor in vegetable-soybean were studied.The results showed that the pre-harvest interval of dichlorvos was 3d,and the product was safe when dichlorvos was rationally applied in vegetable soybean.The pre-harvest interval of profenofos was 18d (reference cabbage) in China and was 28 d in Japan and European Union.When profenofos was improperly applied in the late middle growth stage or late growth stage of vegetable-soybean,the pesticide residue in final product was beyond the standard of maximum residue limit in food.With proper application of butachlor at the day of vegetable-soybean seeds being sowed,the final product was of safe standard.

Key words: vegetable-soybean, dichlorvos, profenofos, butachlor, pre-harvest interval, application technology