庭院和宅旁绿化树种 ,在有些年份、病虫危害较重。由于所处位置的特殊性 ,不能象大田防治直接喷雾 ,其原因一是污染环境 ,危及人、畜安全 ;二是树体较高大的 ,药液难于接触虫体。笔者在多年的实践中总结出几种有效的防治方法 ,以供参考。１、灌溉或根埋内吸传导药剂在虫害发生 Garden and green house next to the tree species, in some years, pests and diseases harms. Due to the particularity of its location, it can not be sprayed directly on the fields as prevention and control of the field. One of the reasons is that it pollutes the environment and endangers the safety of people and animals. Second, when the tree body is taller, the liquid medicine is hard to come into contact with insects. In my many years of practice, the author summed up several effective methods of prevention and control for reference. 1, irrigation or root-buried conduction agent in pests