柿绒粉蚧种群空间分布及抽样技术探讨  

Study on the Spatial Distribution and Sampling Tactics of Persimmon Wooly Scales

作　　者：徐劭[1] 刘顺[1] 肖满一 马喜增 张宝杰 王长占 

机构地区：[1]河北农业大学植保系 [2]唐县科委 [3]平泉县种子公司 [4]完县林业局

出　　处：《河北农业大学学报》1992年第4期39-42,共4页Journal of Hebei Agricultural University

摘　　要：根据系统调查资料,对柿绒粉蚧 (Eriococcus kaki kuwnan) 在柿树上的空间分布及抽样技术进行了初步探讨,其结果为:柿绒粉蚧种群密度在树冠不同部位的顺序为,垂直方向,下部树冠>中部树冠>上部树冠,下部树冠四个方向依次为西>南>东>北,内外两层以外层密度为高,柿绒粉蚧的空问分布为聚集型,聚集密度在不同部位有所差异,总的表现为低密度,高聚块,高密度,低聚块。在t=1,D=0.2,其理论抽样数为681个样方,但只以东西两侧为取样单位时,同样条件下,理论抽样数下降为475个样方。This paper deals with the spatial distribution and sampling tactics of the persimmon wooly scales Eriococcus kaki Kuwana. It was found that the persimmon wooly scales were distributed mainly on the lower and middle layer of the crown. Its distribution was aggregated in all parts of the crown and the intensities were different in different position on the crown and it was negatively correlated with the persimmon wooly scale's population density.The value of λ showed that the behaviour of the persimmon wooly scales was responsible for its aggregation. The number of optimum sampling of the persimmon wooly scales was 681 when preciseness level was 0.2. In the same condition, the number of optimum sampling was 475 when the sampling parts was only in the east and west part of the lower layer crown.

关 键 词：柿绒粉蚧 种群 空间分布 柿树 害虫 

分 类 号：S436.65[农业科学—农业昆虫与害虫防治]