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[目的]探明普通大蓟马Megalurothrips usitatus(Bagrall)的嗜好颜色及其田间日活动节律.[方法]分别在室内和田间对10种不同颜色色板(白色、黑色、灰色、红色、绿色、黄色、蓝色、紫色、粉色和浅蓝色,佳多?)进行了非选择性试验,并通过将RGB颜色值转换为虚拟波长进行最嗜颜色量化非选择性试验,然后选择引诱效果最好的色板对普通大蓟马进行日活动节律调查.[结果]室内和田间选择试验表明蓝色对普通大蓟马的吸引率显著高于其它颜色,其次是浅蓝色和紫色;由RGB颜色值转换虚拟波长得到普通大蓟马最嗜颜色对应的波长为470 nm(RGB值为0,193,255,蓝色);通过蓝板调察普通大蓟马日活动节律发现,普通大蓟马成虫种群活动节律明显,活动规律呈单峰型,活动最高峰为8:00—10:00,夜间(20:00—次日6:00)几乎不活动.[结论]研究结果为基于颜色趋性的普通大蓟马田间监测和综合治理提供了理论基础和科学依据.“,”[Objectives] To investigate the color preferences and diurnal rhythm of the bean flower thrip, Megalurothrips usitatus (Bagrall). [Methods] The preferences of adult M. usitatus for sticky traps of ten different colors; white, black, gray, red, green, yellow, blue, purple, pink, and light blue, were determined in both the laboratory and the field, and the most preferred colors were quantified by converting RGB values to virtual wavelengths. [Results] Blue sticky traps were the most attractive to M. usitatus, followed by light blue sticky and purple traps. A virtual wavelength of 470 nm [RGB (0, 195, 255)] was significantly more attractive to M. usitatus than other colors in laboratory tests. The diurnal activity of adult bean flower thrips had an obvious rhythm. The peak of daily activity was from 8:00-10:00 am and they were inactive at night. [Conclusion] These results provide theoretical and technical support for bean flower thrip monitoring and the integrated management of this pest.