摘要
采用频次分布拟合ｘ２检验、Ｉｗａｏ的ｍ＝α＋βｍ回归、Ｔａｙｌｏｒ的幂法则等８种方法，通过对７块麦田中七星瓢虫、异色瓢虫幼虫及其混合种群的空间分布型分析，结果表明：无论瓢虫幼虫的单种种群还是混合种群，其空间分布型均为聚集分布。聚集的原因主要是由其自身习性所致。抽样方式以棋盘式抽样代表性较强，其它方式较差。
Based on the field investigation the spatial distribution pattern of the larvae of ladybeetle:Coccinella septempunctata L. and Harmonia axyridis (Pallas) in wheat field were tested by the index C,Iδ, M* etc, Iwao's M*-m regression and Taylor's power law. The results showed that the spatial distribution pattern of the larvae, whether single population or mixed population of the two species of ladybeetle, are aggregate and most of them can be illustrated by negative bionomial distribution. The main reason of aggregation is caused by the biology of the ladybeetle. The best sampling method is to sample the larvae according to the shape of chessboard.
出处
《昆虫天敌》
CSCD
1998年第1期24-29,共6页
Natural Enemies of Insects
关键词
七星瓢虫
异色瓢虫
幼虫
空间分布
抽样技术
Coccinella septempunctata L.
Harmonia axyridis(Pallas)
Larvae
Mixed population
Sampling Method
Spatial Distribution
