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广东省四会市（县）大沙镇（区）１９７３年开展以发挥天敌作用为主的水稻害虫综合防治，２０多年来稻飞虱一直没有大发生，且发生程度低于临近地区。本文试图从理论上解释这一现象。通过改善天敌的生境条件，捕食性天敌群落种库中天敌的种类和多样性增多，天敌群落重建和发展的能力增强，重建后群落的种类、数量和多样性均高于临近地区，最终使得天敌群落对稻飞虱的控制作用增强，９８％以上的稻田稻飞虱的数量常在防治指标以下。
In 1974, Dasha Town (District), Sihui City, Guangdong Province (County) carried out integrated pest management to play a natural enemy’s role. Rice planthopper has not occurred much for more than 20 years and its occurrence is lower than that of the neighboring areas. This article attempts to explain this phenomenon theoretically. By improving the habitat conditions of natural enemies, the species and diversity of natural enemies in the species families of predatory enemies increased, and the ability of natural enemies community reconstruction and development increased. After reconstructing, the species, quantity and diversity of the communities were higher than those in the adjacent areas, Community control of planthoppers increased, more than 98% of the number of rice planthoppers are often below the control indicators.