摘要
采用 4种频次比较法和 6种聚集指标公式测定了甘薯卷叶蛾幼虫空间分布型。结果表明 ,其在甘薯生长期间的分布是聚集分布。其聚集分布的原因是由环境条件所造成的。确定了理论抽样数据和田间抽样技术。
The distribution pattern of the larva of Brachmia macroscopa was determinated by using 4 methods of freguency distribution and 4 methods of distribution pattern index.The results showed that their distribution patterns all belonged to the eggregated pattern during the growth stage of potato and this pattern was caused by environment factors.The numbers of Theoretical sumpling and the sumpling method in field were determinted.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2003年第2期206-208,共3页
Journal of Shandong Agricultural University：Natural Science Edition
关键词
甘薯
卷叶蛾
幼虫
空间分布型
应用
聚集分布
环境条件
抽样数据
the larva of Brachmia macroscopa,distribution patten,number of theoretical sumpling,sequential sampling,largest sumpling number
