摘要
[目的]为了更好地防治桃园害虫桃一点斑叶蝉。[方法]采用聚集度指标法I、wao回归分析法和Taylor幂法则,研究桃一点斑叶蝉种群在桃树树冠东、南、西、北4个方向上的空间格局,并用聚集均数分析其聚集分布的原因。[结果]自5月下旬到10月上旬,桃一点斑叶蝉在桃树树冠东、南、西、北4个方向上均呈聚集分布,且各聚集度指标大致相近。桃一点斑叶蝉个体间相互吸引,分布的基本成分为个体群。在7月中旬和7月底至8月上旬,桃一点斑叶蝉的种群密度较高,平均拥挤度较大。桃一点斑叶蝉在桃树树冠上呈聚集分布是由环境条件引起的。[结论]桃一点斑叶蝉在桃树不同方向上均呈聚集分布。
[ Objective ] The purpose of the study was to control the pest Erythroneura sudra in peach orchard better. [ Method ] The aggregation index method, lwao regression analysis and Taylor＇s power law were applied to study the spatial pattern of E. sudra population in 4 directions of east, south, west and north of peach crown. And the cause of its aggregatted distribution was analyzed by aggregation average. [ Result ] From late May to early Oct, E. sudra showed aggregated distribution in 4 directions of east, south, west and north of peach crown and their aggregation indices were mostly similar. E. sudra individuals attracted each other and the individual group was basic component in its distribution. In middle Jul. and from the end of Jul. to early Aug., the population density of E. sudra was higher with bigger mean-crowding degree. The aggregated distribution of E. sudra in peach crown was induced by environmental condition. [Conclusion] E. sudra showed aggregated distribution in different directions of peach crown.
出处
《安徽农业科学》
CAS
北大核心
2008年第9期3749-3751,共3页
Journal of Anhui Agricultural Sciences
关键词
桃一点斑叶蝉
种群
空间格局
Erythroneura sudra
Population
Spatial pattern
