摘要
应用３种不同抽样法，研究了矢尖蚧在空间的分布型均为聚集分布。通过模糊聚类分析，将矢尖蚧在树冠上的分布分为４个亚群，矢尖蚧种群数量大小依次是：亚群Ⅳ＞Ⅲ＞Ⅱ＞Ⅱ。
In this paper ,three different sampling methods,1 ,a tree as a sampling unit,2,24 littlepositions in the crown of a tree as sampling units,3, a leaf as a sampling unit,showed that thespatial distribution patterns of Umaspis yanonensis(Kuwana )belong to aggregate distribu-tion,Fuzzy cluster analysis suggested that the distributions of 24 positions in the crown of atree could divided into 4 subcommunities. population of the scale insect were subcommunity Ⅳ>Ⅲ>Ⅱ>Ⅱ。
出处
《西北农业学报》
CSCD
1994年第2期53-58,共6页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
虫害
矢尖蚧
空间分布型
柑桔
Unaspis yanonensis(Kuwana )
Spatial distribution pattern
Fuzzy clus-ter analysis
