Coincidence level in spatial distribution of Eulecanium gigantea and Blastothrix sericae
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摘要: 采用多个聚集度指标和回归分析法对枣大球蚧Eulecanium gigantea及其主要天敌球蚧蓝绿跳小蜂Blastothrix sericae的空间分布格局进行研究。各聚集度指标均表明:枣大球蚧及其球蚧蓝绿跳小蜂在空间上的分布格局均是聚集分布;Taylor幂法则、Iwao的回归分析法也表明:枣大球蚧及其球蚧蓝绿跳小蜂在空间上的分布格局也是聚集分布,且聚集强度随种群密度的升高而增加;这种分布形式的一致性,有力地提高了天敌对寄主的自然控制能力。表3参10Abstract: The spatial distribution patterns of Eulecanium gigantea and its natural enemies Blastothrix sericae were determined,the equations of optimal sampling were formulated based on the regression models with multiple aggregation indices. The result showed that spatial distribution pattern of Eulecanium gigantea and Blastothrix sericae belonged to aggregative distribution. Regression analysis of Iwao and Tayler also obtained a similar conclusion,Eulecanium gigantea and Blastothrix sericae belonged to aggregative distribution and with the population density increasing,aggregation index increased. The coincidence in distribution effectively increased the control capacity of natural enemies on their hosts.[Ch,3 tab. 10 ref.]
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Key words:
- forest protection /
- Eulecanium gigantea /
- Blastothrix sericae /
- spatial distribution
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2012.05.026
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