我国农作物主要病虫害有1500多种,特别严重的有几十种,它们此起彼伏地频繁发生成灾,在各地造成大量损失,是阻碍我国农业生产发展的突出问题之一。已往单纯大量使用化学农药防治病虫害带来了诸多负面影响:残留农药污染环境、危害人体健康;病虫害产生抗药性使防治成本增高;已被控制的害虫再度危害并发生 There are more than 1,500 major pests and diseases in our country and there are dozens of species that are particularly serious. Their frequent occurrences and disasters cause losses in many places, which is one of the prominent problems that hinder the development of agricultural production in our country. In the past, the simple and heavy use of chemical pesticides to control pests and diseases has brought many negative effects: residual pesticides pollute the environment and endanger human health; pest and disease resistance increases the cost of prevention and treatment; the pests that have been controlled are re-harmed and occur