摘要
本文采用比较频次法、聚集度指标法研究了松埃尺蛾越冬代蛹和第一代幼虫的空间分布型。结果表明：越冬代蛹、第一代幼虫的空间分布型呈负二项分布，其分布的基本成分为个体群，个体间相互排斥。并应用Ｉｗａｏ方法分析、检验了不同虫口密度下林间调查的最适抽样数，列出序贯抽样分析表。
Spatial distribution patterns for the overwintering pupae and first-generation larvae of Ectropiscrepuscularia were studied by adopting the comparative frequency method and the aggregation index method.The results showed that the spatial distribution patterns of the overwintering pupae and first-generationlarvae assumed negative binomial distribution and the basic component of the distribution was individualcolony.
出处
《福建林业科技》
1996年第4期20-25,共6页
Journal of Fujian Forestry Science and Technology
关键词
松埃尺蛾
空间分布型
最适抽样数
Ectropis crepuscularia：spatial distribution pattern：optimal sampling number：sequential sampling
