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森林昆虫的种群分布型常因虫种、虫期,虫龄的不同而有差异,也随虫口密度的大小而变化,又受地形、地势、土壤、寄主植物种类、种植方式以及林间小气候等外界环境条件的影响。因此,了解森林昆虫在林间的分布型,是每个森保工作者必须首先查明的工作。它不仅关系着调查取样、试验设计,而且还可借以看出害虫的生活习性和对不同环境条件的适应程度,从而有助于对种群消长规律的分析,以便根据调查结果,正
Forest insects often distributed due to insects species, insects, insects age differences, but also with the size of insect population changes, but also by topography, topography, soil, host plant species, planting methods and forest microclimate The impact of external environmental conditions. Therefore, knowing the distribution pattern of forest insects in the forest is the work that every forest protection worker must first identify. It is not only related to the sampling, experimental design, but also to see pests habits and adaptability to different environmental conditions, which helps to analyze the law of population growth, according to the survey results, positive