防治树木病虫害常用树冠喷药法,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。如果采用树干包扎农药法,则可使农药的有效成份均匀地输送到树冠枝叶上,从而达到良好 Prevention and control of tree pests commonly used crown spray method, due to the tall crown, dense foliage, not only difficult to work, but also difficult to spray evenly spray, the control effect is often less than ideal. If the trunk bandage pesticide law, you can make the active ingredients of pesticides evenly delivered to the branches crown crown, so as to achieve good