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解放后,施用化学药剂对于压低病虫危害程度和保证农作物丰收起到了积极作用。但由于长期大量使用化学药剂也带来了一系列的新问题,如害虫的抗药性、杀伤天敌、破坏生态平衡、污染环境产生残毒、农业成本增加等。因而迫使人们从生态系统的观点出发,在生物界的食物链与食物网上寻找以虫治虫、以菌治虫、以菌治病、以虫(或菌)治草的新的防治途径。 为进一步使生物防治在“综合防治”中发挥更大的作用,我们于1981～1983年对我区八县一市(注)天敌昆虫资源进行了摸底调查和定点观察,共采集到天敌昆虫11个目约200种,已鉴定的有19科63种,农田蜘蛛百余种,已鉴定的有7科24种。
After the liberation, the application of chemical agents has played a positive role in reducing the degree of pests and diseases and ensuring the harvest of crops. However, due to the long-term large-scale use of chemical agents, a series of new problems have also been brought about, such as the resistance of pests, the killing of natural enemies, the destruction of ecological balance, the pollution caused by the environment and the increase of agricultural costs. Thus forcing people to look for the new prevention and cure ways of treating insects by worms, controlling bacteria by bacteria, curing diseases by bacteria and controlling by insects (or bacteria) on the food chain and food web in the biological world from the viewpoint of ecosystem. In order to further enhance the role of biological control in “integrated prevention and treatment”, we conducted a thorough investigation and site-specific observation of natural enemy insect resources in eight counties and one city in 1981-1983 and collected a total of 11 natural enemy insect species About 200 species, of which 19 families and 63 species have been identified, over 100 species of farmland spiders have been identified, and 7 families and 24 species have been identified.