防治树木病虫常用喷药法,由于树冠高大,枝叶浓密,不仅作业困难,而且难以喷匀喷透,防治效果往往不够理想。采用树干包扎农药法,药液可渗透到木质部导管内,并扩散到蒸腾液流中均匀地输送到树冠枝叶上,这样可防止树干和枝叶上的病虫害,与喷药相比具有省药、省工、污染少、效率高的优点。 Prevention and control of common pests and diseases of trees spray method, the crown tall, thick foliage, not only difficult to work, but also difficult to spray evenly spray, the control effect is often not ideal. Tree trunk dressing pesticide law, the liquid can penetrate into the xylem catheter, and spread to the transpiration flow evenly delivered to the canopy branches and leaves, so as to prevent pests on the trunk and foliage, compared with the spray medicine, provincial Workers, pollution, high efficiency advantages.