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通过对大兴安岭北部火烧迹地上猖獗发生的落叶松八齿小蠹(Ips subelongatus Motsch.)的雄虫(侵入孔)空间分布型及其群居危害机理的分析,该虫雄虫的空间分布属聚集分布。扩散蔓延规律为聚集型,其程度同火烧程度一样。随有虫株率及虫口密度的变化而改变。当有虫株率达100％,虫口密度大于7个侵入孔/1000 cm~2。时趋于均匀分布。对此虫群居危害原因分析可知,造成聚集分布的根本原因是寄主落叶松衰弱木的聚集分布及先锋雄虫释放聚集信息素的综合作用。
Based on the analysis of the spatial distribution pattern of male (larvae) larvae and their community hazards in the larvae of Ips subelongatus Motsch., Which occurred in the northern part of the Greater Hinggan Mountains, the spatial distribution of the larvae was aggregated . The spread of the spread of the law as agglomeration, the extent of the same extent with the fire. With the rate of insect strains and insect population density changes. When the rate of insect strains reached 100%, the density of insect population was more than 7 intrusion holes / 1000 cm ~ 2. When tends to be evenly distributed. Analysis of the causes of this insect community hazards shows that the root cause of aggregation is the distribution of the host Larix fragmatum aggregation and the release of aggregated pheromone pioneer male role.