侧多食跗线螨实验种群繁殖特征生命表

The reproductive life table of Polyphagotarsonemus latus.

研究了侧多食跗线螨Polyphagotarsonemuslatus (Banks)在 2 5℃ ,相对湿度 85 %～ 90 % ,取食辣椒条件下的种群繁殖特征生命表。结果表明 :该螨的内禀增长力为 0 2 94 8,周限增长率为 1 34 2 9,净增殖率为 2 5 4 94 4,种群世代平均周期为 1 3 85 0 9d ,种群加倍时间为 2 35 1 2d ,在理论年龄组配中 ,未成熟期(卵、幼螨、若螨 )占 70 1 781 % ,成螨占 2 9 82 1 9%。

The reproductive life table of Polyphagotarsonemus latus (Banks) in feeding on pepper was studied at 25℃, 85%～90%RH . The result showed that intrinsic rate of increase( r m ), finite rate increase( λ ), net reproduction rate( R 0), the mean generation time( T ),and double population time( t ) were 0 2948, 1 3429, 25 4944, 13 8509?d and 2 3512?d, respectively. In stable age distribution of experimental population, the immature period was 70 1781% and the mature period was 29 821%.