桃蚜空间格局的研究

Spatial Pattern of Myzus Persicae(Snlzer) on Early-Maturing Cabbace

应用检验昆虫种群空间格局的方法,得出桃蚜在早熟甘兰田中以疏松的个体群呈聚集分布,个体群内的分布是随机的,在一切密度下均为聚集分布,聚集强度具密度依赖性。聚集是由桃蚜习性引起的。根据其空间格局,提出了估计田间种群数量的最适抽样数。

Several metnoas were used to test the spatial pattern of Myzus persicae (Sulzer) population on the early-maturing cabbage The results showed that the spatial pattern of M. persicae belonged to an aggregated pattern at various densities Its population cousisted of loose colonies. The distrioution of the colonies was aggregated and intracolony was random. The intensity of aggregation was of density dependence. The aggreation pattern resulted from the habits of M. persicae. Based on the spatiel pattern, the optimum number of sampling unit was proposed for estimating population density in the field.