紫胶虫雌成虫群体密度测算公式及其测算结果分析

The formulas for Determining group density and its analysis of female adult lac insect

摘要: 本文根据紫胶虫雌成虫在寄主植物上的群体结构特征，建立了其群体密度的新公式：(1)N=4/Πd2、(2)N=1/D2、(3)N平/(4+π)/2πD2。这些公式可以简单、迅速、准确地计算出紫胶虫雌成虫群体密度的置信区间和平均值。试验结果表明，运用这些公式计算紫胶虫雌成虫的群体密度比传统的测定方法，更为精确和简便。

Abstract: This paper established new formulas for determining group density of female adult lac insect based on its characteristics of group distribution on host:(1)N=4/Πd2,(2)N=1/D2,(3)N/(4+π)/2πD2,those formulas can calculate the confidence interval and average value of group density of female adult lac insect.Test results has shown new those formulas ane more accurate,more simple and convenient than the traditional method for determining group density.