白蜡虫在寄主植物上的分布特征研究

Studies on Distribution Characteristics of Chinese White Wax Scale ( Ericerus pela Chavannes) on Host

白蜡虫在寄主上的分布与方向和寄主枝条的位置有关，不同虫期分布特征不同。在定叶期，白蜡虫种群在方位上差异不太大，但雌雄虫在方位分布上有明显差异。种群数量分布依次为东（２８．０５％），南（２６．５５％），西（２５．０６％），北（２０．３４％），雌虫依次为东（３２．１６％），南（２７．３６％），北（２０．３４％），西（１８．６５％）；雄虫依次为西（３０．７６％），南（２５．８４％），东（２４．２９％），北（１９．１％）；在枝条位置上，种群数量分布依次为基部（６５．７１％）、中部（２３．９５％）和梢部（１３．１８％）。在定杆期，雌虫定杆数量分布依次为梢部（４９．１１％）、中部（２８．８０％）和基部（２１．０９％），雄虫依次为中部（９０．７１％）、基部（７．００％）和梢部（２．２９％）。

The distribution of Chinese white wax scale on host relates to direction and position of the host branches. There are different distribution characteristics in different stages. During the period of the insect on leaves,the distribution of population in direction are 28.05% in east,26.55% in south,25.06% in west and 20.34% in north. The distribution of female insect in direction are 32.16% in east,27.36% in south,20.34% in north and 18.65% in west,male insect are 30.76% in west,25.84% in south,24.29% in east and 19.01% in north. The distribution of population in branch position are 65.71% in the lower part,23.95% in the middle and 13.18% in the upper. During the period of the insect on branches,the distribution of female insect in position are 49.11% in the upper part,28.80% in the middle and 21.09% in the lower part,male insect are 90.71% in the middle part,7.00% in the lower and 2.29% in the upper part.