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该文研究了 3种林分类型樗蚕 Philosamia cynthia自然种群动态。结果表明 :樗蚕世代内种群数量呈不断减少趋势 ;在各虫期中 ,1～ 2龄幼虫存活率最低 ,卵期存活率最高 ;不同世代间 ,第 1代存活率高于第 2代 ;在不同林分类型中枣粮间作存活率最低 ,而臭椿片林最高。在不同世代间各虫期的死亡原因和死亡率及变异程度有所不同 ,在不同年度间以蛹期死亡率变异最大 ;在不同林分类型中枣粮间作类型中樗蚕世代总死亡率及各虫期死亡率高于臭椿片林和臭椿行道树
This paper studied the natural population dynamics of three species of Philosamia cynthia. The results showed that the population of B. mori was decreasing continuously. At each stage, the larvae of 1st to 2nd instar larvae had the lowest survival rate and the highest survival rate of ovum. The survival rate of the first generation was higher than that of the second generation among different generations. Different types of forest jujube grain intercropping survival rate lowest, while Ailanthus altissima forest highest. The death causes, mortality rates and degree of variation in different stages were different in different stages, and the variation in mortality was the largest in different years. In the different types of jujube, the total mortality of B. mori and The mortality rate of each stage was higher than that of Ailanthus altissima forest and Ailanthus stephens