梨二叉蚜种群空间分布型及聚集成因的研究  

Study on the Analysis of Spatial Distribution for the Population of Schizaphis piricola Matsumura on Pear and the Aggregation Cause

作　　者：太一梅[1] 傅杨[1] 杨本立[2] 陈国华[2] 陶玫[2] 

机构地区：[1]云南省昆明市植保植检站,云南昆明650034 [2]云南农业大学植物保护学院,云南昆明650201

出　　处：《云南农业大学学报》2004年第3期287-289,329,共4页Journal of Yunnan Agricultural University

摘　　要：2000年对危害梨树的梨二叉蚜进行系统调查,调查结果采用Taylor的幂法则,Lloyd的平均拥挤度和平均聚块性指标,Iwao的m -m回归分析法进行空间分布型分析,得到的结果均一致。梨二叉蚜在树冠上的空间分布为聚集分布,且其种群随着虫口密度的变化,呈现出扩散→聚集→扩散→聚集→扩散的变化规律。λ值表明梨二叉蚜在不同时期其聚集成因不同。The spatial distribution of Schizaphis piricola Matsumura was studied by the means of Lloyd's mean crowding and index of patchiness, Iwao's patchiness and Tayor's law. All the results showed that the special patterns of Schizaphis piricola Matsumura were aggregated distribution on the pear tree. And also, the population of Schizaphis piricola Matsumura presented the regular aggregation and dispersion pattern with density variation. The aggregation causes were different in different periods.

关 键 词：梨树 梨二叉蚜 空间分布型 聚集成因 

分 类 号：S661.2[农业科学—果树学]