经一年多的时间,在马拉维收集了巨桉(Eucalyptus grandis)原木天牛(Pho-racantha semipunctata(F))室内种群和田间种群的年龄特征生命表资料。幼虫期死亡率最大,主要死亡因子是种内竞争。种群在极度拥挤导致下一代种群数量下降。过度拥挤还会使虫体变小,而且使雄性比增大。本文还介绍了消灭潜在的繁殖场所是控制该害虫的有效方法。 For more than a year, age-specific life table data for indoor and field populations of Pho-racantha semipunctata (F) from Eucalyptus grandis were collected in Malawi. The larval mortality is the largest, and the major factor of death is intraspecific competition. The population is extremely congested and the population of the next generation is declining. Overcrowding will make the body smaller, but also to increase the ratio of males. This article also describes that eliminating potential breeding grounds is an effective way to control the pest.