刚竹毒蛾自然种群生命表的研究

Study on the Natural Population Life Tables of Pantana phyllostachysae Chao

1998～ 1 999年在福建南平西芹对刚竹毒蛾自然种群进行了系统观察 ,组建了越冬代生命表以及 5个世代平均生命表 .刚竹毒蛾自然种群存活曲线属 Price A型 ,平均种群趋势指数 I为1 .658,越冬代种群趋势指数 I为 1 .872 ,1～ 2龄幼虫的自然死亡是影响种群的重要因子 。

In 1998～1999, the natural population life table of pantana phyllostachysae Chao was studied in Xiqin village, Nanping city, Fujian Province. Based on the investigation data, the natural population life table of overwinter generation and the average life table in five generations were developed. It was concluded that all the survival curves from the life tables belong to Price's type A, the trend index of the average natural population was 1.658, and that of the overwinter population was 1.872. The death of larvae in 1～2 instar was the key factor affecting population dynamics, and natural enemies were the key factor between 4th instar larvae and pupae stage.