马尾松舞毒蛾卵块空间分布型及其应用的研究

A STUDY ON THE SPACIAL DISTRIBUTION PATTERN OF EGGS OF LYMANTRIA DISPAR (L.) AND ITS APPLICATION

马尾松舞毒蛾卵块的空间分布型,用聚集度指标度量适合聚集分布。Iwao的回归分析法与Taylor幂法则也是确定聚集型分布的好方法,结果都说明是聚集型的。由此可确定抽样调查的最适抽样数,编制序贯抽样分析表,用于预测预报和防治效果的检验。

The spacial distribution pattern of eggs of Lymantria dispor (L.) is an aggregation distribution fitted by means of several indexes of aggregation. Iwao's method of regression of mean crowing (x~*) on mean density(?)and Taylor's power method of mean variance (s^2) on mean density(?) are good methods for determining the aggregation pattern. All of them show that the spacial distribution pattern is an aggregation distribution therefore, it is eazy to determime the optimum sampling size and to compile the tables of sequen- tial sampling analysis for testing the effect of pest control and its prediction.