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推广生物防治,减少农药污染,是农业生态环境保护工作的重要内容,也是自然保护工作的一个方面.农作物大面积单一品种的种植,容易形成病虫危害,造成作物减产,质量降低.为了防治病虫害,通常施用大量化学农药.这虽然能起到暂时作用,但会带来一系列的环境问题.例如农药污染使农产品质量下降;农药大量进入环境,破坏生态平衡;农药在杀死害虫的同时,连同害虫的天敌一并消灭,于是造成病虫害的再次猖獗…….多次使用同种化学农药,还会使害虫形成抗药性,从而给防治工作带来新的困难.
To promote biological control and reduce pesticide pollution is an important part of agricultural eco-environmental protection work and one aspect of natural conservation work. The planting of large-scale single-species crops is prone to pest and disease damage, resulting in crop yield reduction and quality reduction. , Usually using a large number of chemical pesticides .This may play a temporary role, but it will bring about a series of environmental problems, such as pesticide pollution, which will lead to the decline of the quality of agricultural products; pesticides enter the environment in a large amount and destroy the ecological balance; while pesticides kill pests, Together with the natural enemies of pests destroyed together, resulting in the re-rampant pests ... .... Repeated use of the same chemical pesticides, but also the formation of resistance of pests, which brings new difficulties in prevention and control work.