龟纹瓢虫是我省常发性几种蚜虫天敌之一,历年同其他天敌种群一起,对减轻蚜虫的发生和危害起了重要作用。二十年来由于大量喷洒化学农药,种群遭到大量杀伤,为进一步发挥其在蚜虫综合治理中的积极作用,1980～1982年我们对其生物学特性及发生规律进行了研究。一、生活史龟纹瓢虫成虫寿命长,世代重叠,为明确 Propylaea japonica is one of several natural enemies of aphids in our province. Together with other natural enemy populations, Propylaea japonica plays an important role in mitigating the occurrence and harm of aphids. In the past two decades, due to the large quantities of chemical pesticides, the population has been massively killed. In order to further exert its positive role in the comprehensive management of aphids, we studied its biological characteristics and occurrence rules from 1980 to 1982. First, the life history of ladybug adult ladybug long life, generations overlap, as clear