1　打孔注药方法的优点树干注药是利用林木输导组织 ,通过蒸腾作用将药液输导至作用部位 (一般需 2 4小时 ) ,最后自然分解 ,不会对周围环境造成污染 ,不杀伤非靶标动植物 ,特别是能有效保护天敌及施药者的人身安全。同时树干注药持续时间长 ,成本低廉 ,操作不受天气、地形影响 The advantages of a perforated injection method Trunk injection is the use of forest tissue transpiration through the transfusion of liquid medicine to the site of action (usually 24 hours), the final natural decomposition, will not cause pollution to the surrounding environment, not Kill non-target plants and animals, especially the personal safety of natural enemies and applicants. At the same time the trunk injection drug duration, low cost, operation from the weather, the terrain