对禄丰县思茅松毛虫 (DendrolimuskikuchiiMatsumura)的生物学特性观测表明 :思茅松毛虫在禄丰县 1年发生 1代 ,以 4龄幼虫越冬。幼虫在林分内的空间分布型为聚集分布 ,m 与 x之间的直线回归关系式为 :m =0 80 4 0 +1 2 873 x ,最适抽样数量为 :N =180 4 / x +2 8 73。组建了思茅松毛虫 2个世代的自然种群平均生命表 ,揭示了该虫在禄丰县种群消长趋势 ,其指数 (I)为 0 33,呈下降趋势。研究结果为有效控制当地滇油杉林的思茅松毛虫危害提供了重要依据 The observation of the biological characteristics of Dendrolimus kuchii Matsumura in Lufeng County showed that the pine caterpillars of Sinocactia solanacearum occurred one year in Lufeng County and overwintered in the fourth instar larvae. The spatial distribution pattern of larvae in the stands was aggregated distribution. The linear regression equation between m and x was: m = 0 80 4 0 +1 2 873 x, the optimal sampling number was: N = 180 4 / x + 2 8 73. The average life table of natural populations of Dendrolimus punctatus was established, revealing the population growth and decline trend of the insect in Lufeng County. The index (I) was 0 33, showing a decreasing trend. The results provide an important basis for effectively controlling the damage of Dendrolimus kasturowii