应用聚集度指标研究柑桔树内矢尖蚧二龄雌虫和雌成虫的种群空间分布型,结果表明: 1、矢尖蚧二龄雌虫和雌成虫在树内的分布均为聚集分布。 2、矢尖蚧二龄雌虫和雌成虫均以上段、南方树冠的聚集程度最大。二龄雌虫以内层的聚集程度较大,而雌成虫以外层的聚集程度较大。 3、矢尖蚧聚集的原因主要与当时柑桔树生长的状况有关,另与初孵若虫的聚集行为有关。 The spatial distribution patterns of second-instar female and female adults of Citellus cunea were studied using the degree of aggregation index. The results showed that: 1. The distribution of second-instar female and adult female of Acanthopanax gossypii was aggregated in the tree. 2, Agkistrodon sophorae second-females and female adults were the above paragraph, the highest concentration of southern crown. The second instar females mainly gathered in the inner layer, while the females accumulated more in the outer layer. Agkistrodon acralis aggregation mainly due to the status of citrus tree growth at the same time, the other with the newly hatched nymph aggregation behavior.