日本的森林面积很大,约占国土的三分之二,它除了作为木材的生产基地外,还具有保护国土、维持水资源、净化环境等作用,是必须保护的国家资源。林业上使用的农药称林业药剂,用林业药剂防治病虫害,是保护森林的重要措施之一。一、林业药剂的使用方法1 .空中喷药法大面积森林用药时,用直升飞机等在空中进行喷 Japan’s forest area is very large, accounting for about two-thirds of its territory. In addition to its role as a timber production base, Japan has the role of protecting the territory, maintaining water resources and purifying the environment. It is a national resource that must be protected. The pesticides used in forestry are called forestry pharmaceuticals and the prevention and control of pests and diseases by forestry pharmaceuticals are one of the important measures for forest protection. First, the use of forest pharmaceuticals 1. Aerial spraying large area of ​​?? forest medication, with helicopters and other aerial spray