对受害油松林进行了大面积调查及差异显著性检验，结果表明：在林冠垂直空间上，中华松针蚧种群数量依次为中层＞下层＞上层，中层与上层、下层与上层间的虫量差异达十分显著和显著水平；在水平方向上，东、西、南、北４个方位间的虫量分布无明显变化规律，其差异不显著；在轮枝的主、侧向枝间，种群变化与虫期有关，在雌成虫和三龄若虫期，主枝上的虫量十分显著地高于侧枝上的虫量，在二龄若虫期，侧枝的虫量占微弱优势，但差异不显著 The results showed that in the vertical canopy space, the populations of Pinus taiwanensis were in order of middle layer> lower layer> upper layer, middle layer and upper layer, and between lower layer and upper layer There was no significant change in the horizontal distribution of insect numbers in the four orientations of east, west, south and north, but the difference was not significant. In the female stage and the 3rd instar nymph stage, the amount of insects on the main branch was significantly higher than that on the side branches. In the second instar nymphs, the number of collateral worms accounted for a slight advantage, but the difference was not significant