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1981年在北京怀柔、延庆两县采集的1393头异色瓢虫鉴定为50个变种和变型(见封三)。对北京异色瓢虫群体50年中表型频率和基因频率的分析表明,黄底型的频率略有下降倾向,与黑底型的频率相比仍占优势。
A total of 1393 Harmonia axyridis collected in 1981 in Huairou and Yanqing counties in Beijing were identified as 50 varieties and variants (see seal three). An analysis of phenotypic frequency and gene frequency over the past 50 years in the population of Harmonia axyridis showed that the frequency of yellow-base type tended to decline slightly, still predominating from the frequency of black-bottom type.