摘要
本文从群落学角度出发,应用多样性指数、均匀度和线性回归等指标和方法,对马尾松林中昆虫群落与松毛虫自僵病流行的关系进行了探讨。结果表明,昆虫群落愈丰富,分布愈均匀,松毛虫白僵病就愈难于流行;捕食性和寄生性天敌昆虫,是马尾松毛虫种群密度较低时虫口的主要控制因子;松毛虫白僵病主要在马尾松毛虫种群密度大的情况下流行,并控制其种群密度的继续扩大。开展封山育林,可保持林间昆虫的多样性,从而可减少松毛虫大发生的机率。
By the use of the index of diversity, the degree of uniformity, and the method of linear regression, the correlation between entomocenose and the muscardine of Dendrolimus punctata was studied from the point of view of community. Results show that the more abundant the insect community is in diversity, and the more uniform it is in distribution, the more difficult will the muscardine be prevalent. The parasitic and the predacious insects are the natural enemies that chiefly control the population number when the population density of the pine caterpillar is low. When the population density gets high, the muscardine epidemic will occur, which will check the continuous expansion of the population density. Therefore, as far as this finding is concerned, muscardine is also an important controlling agent. In the light of the above results, it is suggested that measures should be taken to dose the land for reforestation so that the diversity of insects can be maintained and chances of the pine caterpillar to break out lessened.
出处
《中南林学院学报》
CSCD
1993年第2期169-175,共7页
Journal of Central South Forestry University
关键词
马尾松毛虫
昆虫群落
白僵病
pine caterpillar, entomocenose, muscardine, index of diversity
