摘要
本文应用8个聚集性指标测算了卫矛矢尖蚧越冬代成虫及1龄若虫的空间分布型。结果表明,成虫及若虫在大叶黄杨上的空间分布均为聚集型,分布的基本成分为个体群。对1龄若虫活动期在时间序列过程中空间分布型变化的分析表明,1龄若虫出现盛期聚集度相对较低,为其种群向更大空间扩展时期;在密度极低时为均匀分布。
Eight indices of aggregation are used to calculate the spatial distribution pattern of overwintered generation adults and first-instar nymphs of Unaspis euonymi. The spatial distribution patterns of the adults and nymphs are of aggregation pattern on the Buxus magistophylla. The basic unit for the distribution pattern is the groups of individuls. The variation in spatial distribution of the first-instar nymph with time indicates that the aggregation degree is relatively low in the peak pear-iod of the first-instar nymph occurance, when the population spreads to the much larger space; but when the density of the nymph is extremely low, the distribution pattern is of uniformity.
关键词
卫矛矢尖蚧
分布
大叶黄杨
unaspis eucnymi (Comstock)
spatial distribution pattern
aggregation degree
Buxus magistophylla
