蜀柏毒蛾卵与初龄幼虫种群株内分布规律的研究

本文对蜀柏毒哦1年2代的卵期与初龄幼虫期在单株上分布规律进行探讨。调查各向各层的种群数量,分析它们与全株数量的相关关系。经方差分析与r值检验,两代卵和初龄幼虫对不同树冠方向的分配比例无显著性差异,而对不同冠层则有极显著性差异,卵集中于中下层,幼虫则集中于上中层;各树冠方向各冠层种群数量与全株数量直线相关极显著。

Distribution Laws of Populations of Eggs and First Instar Larve of Parocneria orienta in an Individual Tree

This paper has a discussion on the distribution laws of the two generations of eggs and first in-star larvae of Parocneria orienta in a year in an individual tree. The population quantities of each storey in each direction are investigated and their correlated relations with the population quantity of the whole tree are also analyzed. By means of variance analysis and checking of r value it is found that the distribution proportions of the two generations of eggs and first instar larvae have no evident difference in different canopy directions. But they are quite varied in each canopy. The eggs cluster in middle and lower storeys of the canopy,while the larvae cluster in upper and middle storeys. The population quantity of each canopy in each direction has an evidently linear correlation with that of the whole tree.