松突圆蚧种群分布的空间格局研究

Study on the Spatial Distribution Pattern of Hemiberlesia pitysophila Takagi

对照区和放蜂区的松突圆蚧雌成虫分布均呈负二项式分布，两区负二项式分布的ｋ值不变，两区每束松针上的平均雌蚧数的变化系由松突圆蚧花角蚜小蜂的寄生所致。

Distributions of Hemiberlesia pitysophila Takagi in both parasite-releasingand check fields were negative binomial ones with the same k value,the difference in av-erage number of female adult scale per bunch of needles was ascribed to the parasitiza-tion.