本试验选用国产2.4-DJ酯和美国产Starane两种农药采用不同浓度处理，对茎直黄芪进行了田间灭除。试验证明，2.4-DJ酯以3000～3750μgg-1，每亩用药液50～70ml，对茎在黄芪有良好的杀灭效果，且药害很小;7500μg·g－1以上浓度虽对茎直黄芪灭除效果达100％，但药害严重;美国产Starane各种浓度处理，对茎直黄芪均有优良杀灭效果，660μg·g－1以上浓度当年防除效果达99％以上，且未发现药害现象。 In this experiment, the domestic 2.4-DJ ester and the American-made Starane two pesticides were treated with different concentrations to sterilize the stem of Radix Astragali. Experiments show that 2.4-DJ ester with 3000 ~ 3750μgg-1, 50 ~ 70ml per mu drug solution, the stems in Astragalus has a good killing effect, and little phytotoxicity; 7500μg · g-1 above the concentration of stem Astragalus reached the efficacy of 100%, but the serious injury; various concentrations of Starane produced in the United States, have good antimicrobial effects of Stem Astragalus, the concentration of 660μg · g-1 more than 99% control over the current year, and not Found that phytotoxicity phenomenon.