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森林可能受到多种方式的危害,如乱砍滥伐、火灾、冰雹、风灾、霜冻、干旱、环境污染等,但最严重的危害可能是森林病虫害,每年我国遭受森林病虫危害的林地面积超过上亿亩。造成蓄积量损失约1500万m3。1975年全国植保工作会议确定了“预防为主,综合防治”的方针,为我国森林病虫害防治工作指明了方向。森林病虫综合防治的涵义,就是充分利用病虫和森林生态环境的辨证关系,以预防为主,以营林技术为基础,发展生物群落中不利于病虫而有利于林木健康生长的因素,因地制宜地运用生物、物理、化学等相辅相成的系统措施,防止环境污染,把病虫控制在不成灾的水平,以达到保护环境和促进林木速生丰产的目的。
Forests may be harmed in many ways, such as deforestation, fire, hail, wind disaster, frost, drought, environmental pollution, etc. However, the most serious damage may be forest pests and diseases. Each year, the forest area affected by forest pests and diseases in our country exceeds On the million acres. Resulting in a loss of about 15 million cubic meters of accumulated reserves.1975 The National Program of Planting and Planting Works approved the guideline of “prevention first and comprehensive prevention and control” in 1975, which pointed out the direction for the prevention and control of forest pests and diseases in our country. The comprehensive prevention and control of forest diseases and insect pests means to take full advantage of the dialectical relationship between pests and diseases and the ecological environment of the forest and take the prevention as the dominant factor. Based on the silviculture techniques, the factors that are not conducive to pests and diseases and conducive to the healthy growth of trees are developed. Local conditions apply biological, physical, chemical and other complementary system measures to prevent environmental pollution, pests and diseases at the level of disaster-free, in order to achieve the goal of protecting the environment and promoting fast-growing trees yield.