为了探明贵州省遵义地区核桃云斑天牛自然种群变化因子,采用特定时间调查取样方法组建该地区云斑天牛的自然种群生命表。分析结果表明,遵义地区云斑天牛的自然种群数量正呈现增长的趋势。通过生命表和排除控制指数得知,影响云斑天牛自然种群最主要的致死因子是云斑天牛的卵孵化率低,其次是四斑露尾甲和阎甲的捕食作用,寄生性的跳小蜂和花绒寄甲也起到比较重要的寄生作用。因此,实际应用中可以着重研究导致卵不能成功孵化的原因对该虫进行有效防治。 In order to find out the natural population variation factors of Crabgrass population in Zunyi area of ​​Guizhou Province, the natural population life table of Coccinella septempunctata in this area was set up by using specific time sampling method. The results show that the natural population of the genus Spotted Beetle in Zunyi is increasing. Through the life table and exclusion control index, it is found that the main lethal factor that affects the natural population of P. aeruginosa is the low egg hatching rate, followed by the predation of four-spotted larvae and Yan Jia. Parasitic Jumping bee and fleece also play a more important parasitic role. Therefore, the practical application can focus on leading to the eggs can not be successfully hatched reasons for the effective control of the worm.