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一森林的生态系很复杂,可以说森林是昆虫个体群密度的自然控制机构容易收效的场所。为此,尽管在森林里有多种昆虫栖息,但林木很少遭受害虫大发生的为害。但如若一经大发生,其规模就很大,防治也困难,同时,为了防治也会加重经济负担。因而,森林害虫防治的根本,可以说是在于进行不使所谓害虫种的个体群大发生的密度管理。换言之,即注意不要破坏对昆虫个体群密度的自然控制机构,这个容易起作用的环境条件来管理森林,使害虫个体群长期保持低密度。
A forest ecosystem is complex and can be said that forests are easily accessible to natural control structures that are individual insect populations. For this reason, despite the many insect habitats in the forest, trees are less susceptible to large pests. However, if a major event occurs, its scale will be very large and prevention and control will be difficult. At the same time, it will also aggravate the financial burden for prevention and treatment. Therefore, the root cause of forest pest control can be said to be the density management that does not cause the occurrence of so-called individual pests. In other words, be careful not to undermine the natural control of insect population density of the body, this easy-to-use environmental conditions to manage the forest, pest individual long-term low density.