Abstract: 【Objective】To evaluate the contact toxicity of ethanol crude extracts from various Aquilegia viridiflora Pall. organs at blooming stage to Myzus persicae（Sulzer）.【Methods】The laboratory contact toxicity of ethanol crude extract from leaves,stems and roots of Aquilegia viridiflora Pall. against Myzus persicae（Sulzer） was measured by soaking. The ethanol crude extract from the whole plant of Aquilegia viridiflora Pall. at the flowering stage was used to carry out the field efficacy test.【Results】Using 50.0 mg/mL ethanol crude extract of Aquilegia viridiflora Pall. leaves,stems and roots treated for 72 h,the mortality and adjusted mortality of Myzus persicae（Sulzer） reached more than 70.00%,and there was no significant difference between treatments（P>0.05）. The toxicity regression equation was y=2.48+1.78x（R²=0.99）for leaves,y=4.84+0.47x（R²=1.00）for stems and y=3.03+1.91x（R²=0.91）for roots. After applying 25.0 mg/mL ethanol crude extract of whole Aquilegia viridiflora Pall. plant in the field for 7 d,the control effect of Myzus persicae（Sulzer） reached 70.31%.【Conclusions】At the blooming stage,the ethanol crude extract of Aquilegia viridiflora Pall. leaves,stems and roots had the same contact toxicity effect on Myzus persicae（Sulzer）. The insecticidal active substances were evenly distributed in the whole plant. The ethanol crude extract of Aquilegia viridiflora Pall. at blooming stage had good field control effect to Myzus persicae（Sulzer）.

Key words: Aquilegia viridiflora Pall., Blooming stage, Myzus persicae（Sulzer）, Insecticidal activity substance, Contact toxicity, Field efficacy