当前,在果树病虫害防治中大量使用化学农药,全年用药多者达20次,不仅污染了环境和果品,又破坏了农业生态系统的平衡和生物的多样性。果树病虫害无害化防治,就是在防治病虫害过程中,减少化学农药用量,保护生态环境,保证农产品农药残留不超过国家标准。为此,应做好以下几方面工作 At present, chemical pesticides are widely used in the prevention and control of fruit tree diseases and pests, and most of them are used for 20 times throughout the year, which not only pollutes the environment and fruits but also destroys the balance of agricultural ecosystems and biological diversity. Fruit tree pests and diseases harmless prevention and control, that is, in the process of prevention and control of pests and diseases, reduce the amount of chemical pesticides, protect the ecological environment, to ensure that agricultural pesticide residues do not exceed the national standard. To this end, should do the following aspects of work