The Construction of Life Table and Application of Dendrolimus houi

The average life table of the natural population of the hibernating generation of Dendrolimus houi was constructed,and the key stage was analysed.The results showed that when the index of natural population fluctuation trend was more than one,the population was increasing.The fluctuant trend of imaginal period was the same as the one of total K value,namely,the imaginal period was the key stage which affected the population fluctuation trend of hibernating generation.