ON THE LIFE TABLES OF NATURAL POPULATIONOF RICE LEAF ROLLER, CNAPHALOCROCISMEDINAL1S GUENEE
稻纵卷叶螟自然种群生命表的研究

This paper deals with the life tables of natural population of rice leaf roller, Cnapha-locrocis medinalis, in Dasha People's Commune, Sihui County, Guangdong Province from 1977 to 1981. During this period of time all together twenty-five generations were observed. Survival curve of each generation was plotted based on the data of life tables. The type of curves basically coincided with those of most insect natural populations and appeared to be Slodbokin IV type. Serious mortality occurred at the younger s...