摘要
根据1986～1988年在泸州调查的资料,采用频次分布检验和聚集强度指标判定法,对粟穗螟幼虫田间种群空间分布型进行了探讨。结果表明,高梁粟穗螟种群的空间分布不受虫口密度和时间的影响,均属聚集分布。分布的基本成分为个体群。聚集强度随虫口密度的升高而增大。
The spatial pattern of the larva population of foxtail millet webworm (Manpara bipunctella R. ) feeding on sorghum ear by the methods of testing the friquency distribution and index of cluster degree was decided. According to the data sampled from 1980 to 1988 in Luzou, Shichuan. The results indicated that the spatial pattern of the larva population of foxtail millet webworm was aggregated in distribution under the conditions of different density. The basic component of spatial distribution was colonial, the cluster degree got higher with the increase of population density.
出处
《西南农业大学学报（自然科学版）》
CSCD
1990年第4期363-366,共4页
Journal of Southwest Agricultural University
关键词
高粱
粟穗螟
种群
空间分布
害虫
Sorghum
Mampara bipunctella Ragonot
population
space distribution/frequency
cluster index
