以前,苏联主要采用化学方法防治森林害虫,特别是食叶害虫。及时用有机氯杀虫剂进行飞机喷撒,能够大面积消灭食叶害虫(如西伯利亚松毛虫、松毛虫、松夜蛾、松尺蠖、松叶蜂等)的发源地。现在,如果做好森林病虫害检验和及时发现其发源地,这些害虫实际上对林业已不造成很大的危害。在柞树林和其它阔叶林里也广泛地使用了有机氯药剂防治食叶害虫。实践证明,采用飞机喷粉的方法不能经常得到预期的效果。因此,近几年来,无论是在苏联,或是在其它国家,飞机喷粉的方法已被更有效和更经济的飞 In the past, the Soviet Union mainly used chemical methods to control forest pests, especially leaf-feeding pests. Timely use of organochlorine pesticides for aircraft spraying, can destroy large areas of leaf-feeding pests (such as Siberian pine caterpillars, pine caterpillars, pine moths, pine bumble bee, etc.) the birthplace. Now, if forest pests and diseases are tested and their place of origin is discovered in time, these pests actually do no great harm to the forestry industry. Organic chlorine agents are also widely used in the control of leaf-eating pests in oak forests and other broad-leaved forests. Practice has proved that the use of aircraft dusting method can not always get the desired results. Therefore, in recent years, the methods of aircraft dusting, both in the Soviet Union and in other countries, have been more efficient and economical to fly