国家林业局日前发布了松毛虫、美国白蛾和杨树食叶害虫防治技术方案,要求切实加强综合治理,有效控制我国森林主要食叶害虫的发生。当前,我国森林病虫害发生面积较大,危害十分严重。尤其是食叶害虫每年发生面积达6000万亩,占我国森林病虫害发生面积的50%以上,给林 The State Forestry Administration recently released the programs for the prevention and control of Dendrolimus punctatus, American white moth and poplar leaf insect pests and urged them to effectively strengthen comprehensive management and effectively control the occurrence of the major leaf-feeding pests in forests. At present, forest pests and diseases in our country have a large area and the harm is very serious. In particular, leafy pests occur every year an area of ​​6000 mu, accounting for more than 50% of the area of ​​forest pests and diseases in our country, to the forest