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1当前我国森林病虫害防治工作存在的主要问题森林病虫害发生面积不断增加,防治难度大。随着人工造林面积的增加,特别是单一树种纯林的增加,病虫危害加剧。在当前资金、人力、技术等有限的情况下,防治难度加大。成灾病虫种类增多,危害损失严重。目前,我国发生严重能够成灾的病虫已由20世纪80年代初的几十种增加到几百种左右,其中有些是由境外陆续传入的,有的是我国从未发现过的。过去就危害比较重的松毛虫、杨扇舟蛾、天牛(类)等至今未得到较好的控制,有的在局部地区年年发生,甚至造成严重损失。
1 The Main Problems Existing in Forest Disease and Pest Control in Our Country Increasing the area of forest pests and diseases is very difficult to control. With the increase of afforestation area, especially the increase of pure tree species, pests and diseases are exacerbated. In the current capital, manpower, technology and other limited circumstances, prevention and control more difficult. Increased species of pests and diseases, serious harm to loss. At present, the number of serious pests and diseases that have hit China since the 1980s has risen from tens to tens of kinds in the early 1980s. Some of them have been imported from abroad and some have never been discovered in our country. In the past, the hardest-hit pine caterpillars, the genus Anserias, the beetles and so on, have not yet been well controlled. Some have even occurred annually in some areas and even caused serious losses.