摘要
本文应用频次分布x^2检验法,Iwao法,Taylor幂法则以及其它聚集指标等方法,分析研究了菜粉蝶绒茧蜂种群(茧块)的空间分布型。结果表明:菜粉蝶绒茧蜂茧块在甘蓝上呈聚集分布,分布的基本成分是以个体群形式存在,个体群之间是随机的,茧块的聚集是由寄主等环境因素引起的。此外,利用分布型参数确定了理论抽样数及序贯抽样。
Nine methods were used to test the spatial distribution patterns of Apanteles glomeratus (L.) in the abbage fields. The results showed that the distribution of cocoon masses of Apanteles glomeratus (L.) belonged to an aggregated distribution. The cocoon masses occur as loose colonies. Distribution of the colonies is random. The reason for aggregation was analyzed with Blackith's λ. The result showed their aggregation seemed to be due to some enviromental factors.Meanwhile, the theoretical sampling numbers were proposed for different densitus with defferent errors and confidence limit. lwao's sequential sampling was made by substitution of α and β from Iwao' s regression equation.
出处
《昆虫天敌》
CSCD
1989年第3期130-135,共6页
Natural Enemies of Insects
关键词
菜粉蝶
菜粉蝶绒茧蜂
空间分布
Pieris Rapae L. Apanteles glomeratvs (L. ) Spatial distribution pattern Sampling technique
