【目的】 明确白星花金龟Protaetia brevitarsis Lewis聚集信息素的有效成分，为白星花金龟的绿色防控提供支持。【方法】 通过动态顶空法收集白星花金龟雌虫、雄虫和雌雄虫混合挥发物，用气相色谱-质谱（Gas chromatography-mass spectrometry，GC-MS）联用技术对收集的挥发物进行分析鉴定，并利用触角电位（Electroantennogram，EAG）仪和Y型嗅觉仪测定白星花金龟对8种化合物的触角电位和行为选择反应。【结果】 白星花金龟雌虫、雄虫和雌雄虫混合挥发物中皆鉴定出8类15种化合物，包括6种烷烃类、2种酚类、2种芳香烃类、1种烯类、1种吡啶类、1种胺类、1种醇类和1种酮类。EAG试验结果表明，白星花金龟对8种化合物都有EAG反应，且不同挥发物间、同种挥发物不同浓度间的EAG反应存在差异。白星花金龟对蒎烷胺、3,4-二甲基-6-乙基苯酚、2,3-二甲基苯乙酮和2,6,10,14-四甲基十七烷4种挥发物的EAG反应相对值在1 µg/µL时达到最大，对萘、苯并噻唑、百里酚和正十四烷4种挥发物的EAG反应相对值在10 µg/µL时达到最大。行为选择反应表明，白星花金龟雌成虫、雄成虫对2,3-二甲基苯乙酮有明显趋向性，选择反应率大于70%，对2,6,10,14-四甲基十七烷、萘、苯并噻唑、百里酚和正十四烷5种物质均表现出显著或极显著的驱避效果，对3,4-二甲基-6-乙基苯酚和蒎烷胺表现出了性别上的差异，雄虫对3,4-二甲基-6-乙基苯酚表现出显著的趋向性，对蒎烷胺表现出显著的驱避性，而雌虫对这2种挥发物却无明显反应。【结论】 2,3-二甲基苯乙酮对白星花金龟雌成虫、雄成虫有明显的引诱效果，2,6,10,14-四甲基十七烷、萘、苯并噻唑、正十四烷和百里酚有较强的驱避作用，推测2,3-二甲基苯乙酮是白星花金龟聚集信息素的有效组分。

[Objectives]  Effective components of the aggregation pheromones of Protaetia brevitarsis Lewis were identified to facilitate the development of green methods for the prevention and control of this pest. [Methods]  Volatiles from females, males and both sexes were collected using the dynamic headspace method and identified with GC-MS. An EAG and Y-type olfactometer were used to test the EAG and behavioral responses of adults to 8 compounds. [Results]  15 compounds were identified in the volatiles collected from females, males, and both sexes, the main components of which were 6 alkanes, 2 phenols, 2 aromatic hydrocarbons, 1 alkene, 1 pyridine, 1 amine, 1 alcohol and 1 ketone. EAG and behavioral responses of females and males were significantly different to the same concentrations of different volatiles, and to different concentrations of the same volatiles. Relative EAG values to (-)-Isopinocampheylamine, 3,4-Dimethyl-6-ethylphenol, 1-(2,3-Dimethylphenyl) ethenone and 2,6,10,14-Tetramethylheptadecane peaked at 1 μg/μL, whereas relative EAG values to naphthalene, benzothiazole, thymol and tetradecane peaked at 10 μg/μL. A choice experiment showed that >70% of females and males were attracted to 1-(2,3-dimethylphenyl) ethenone, but that a significant, or very significant, number were repelled, by 2, 6, 10, 14- tetramethylheptadecane, naphthalene, benzothiazole, thymol and tetradecane. Gender differences were apparent in the responses to 3,4-dimethyl-6-ethylphenol and (-)-Isopinocampheylamine; males were significantly attracted by 3,4-Dimethyl-6- ethylphenol and significantly repelled by (-)-Isopinocampheylamine, whereas females had no obvious response to these 2 volatiles. [Conclusion]  2,3-Dimethylacetophenone is attractive to both adult female and male P. brevitarsis, whereas 2,6,10,14-Tetramethylheptadecane, naphthalene, benzothiazole, thymol and tetradecane are strongly repellent to both sexes. We suspect that 2,3-Dimethylacetophenone is the active component of the aggregation pheromones of this species.