【摘要】 为了给小麦蚜虫防治提供依据,应用聚集度指标有关参数,分析了麦长管蚜种群在麦田中的空间格局和时间动态。结果表明,麦长管蚜在麦田中的分布属聚集分布,并以个体群疏松形式存在,个体间相互随机吸引,个体群闷是聚集的。应用模糊聚类方法,将种群按时间动态分为8个状态集,初盛期(A3)是防治重点。更多还原

【Abstract】 By using the cluster degree as a relative parameter, the spacial patterns and epidemic dynamics of aphid Sitobion avenue populations were analyzed. The results showed that in wheat fields the aphid populations distributed aggregately, with the loose population patterns existing. The individuals were attracted each other at random. The inter-populations were aggregate. By applying fuzzy cluster analysis to this research, the epidemic dynamics were divided into eight cluster states in which the early propagation period was the key to control its epidemics.更多还原