果树上许多病虫,如苹果树早期落叶病、黄斑卷叶蛾、银纹潜叶蛾等,都是在落叶和杂草中潜伏过冬。过去防治这些病虫主要在果树生长季节进行化学药剂喷洒,但成本高、花工多、污染大,同时对人畜都不安全。另外,也提倡冬季清园,即利用人工扫落叶和铲除杂草,以减少菌 Many pests on fruit trees, such as apple tree early deciduous disease, macular leaf roll moth, silver leaf miner, are lurking in the leaves and weeds in the winter. In the past, these pesticides were mainly used to spray chemical pesticides during the growing season of fruit trees. However, the cost was high, the number of workers was large, the pollution was heavy and the safety of human and animals was not high at the same time. In addition, it is also advocated that the winter clearing garden uses artificial sweeping leaves and weeding to reduce weeds