【摘要】 采用Iwao和Lioyd提出的聚集强度分析方法 ,研究了斜纹夜蛾 2～ 3龄幼虫在甘蓝田间的空间分布型 ,结果表明 :斜纹夜蛾 2～ 3龄幼虫在甘蓝田间的空间分布型为聚集分布 ,分布的基本成份为个体群 ,且具密度依赖性。根据其在田间的分布参数 ,制定了序贯抽样公式、抽样表和抽样图更多还原

【Abstract】 This paper studied the spatial distribution pattern of the second-third instar larva of Prodenia litura Fabricus in Brassica oleracea field by the contagious index analyses, which were advanced by Iwao and Lioyd. The results showed that there was aggregation distribution of the 2nd～3rd instar larva of Prodenia litura in cabbage field with the group as the basic composition of spatial distribution and the dependence on the density. According to the spatial distribution parameters,the sequential sampling formulas, tables and charts were provided.\;更多还原