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应用粘卡法和陷阱法（ｐｉｔｆａｌｌ ｔｒａｐ）研究了茭白田中缨小蜂和长绿飞虱的种群动态，以及缨小蜂和捕食性天敌在茭白田和水稻田之间的迁移规律。在水稻生长期，茭白田中缨小蜂和蜘蛛迁往稻田，水稻收割及休闲期，稻田中的缨小蜂和蜘蛛迁回茭白田。因此，茭白和水稻的合理布局可有效地提高稻飞虱天敌在稻田中的种群数量，从而提高天敌对害虫的自然控制作用。
The population dynamics of Oncomelania hupensis and Pelagicus simianis and their predators were studied by using the sticky-trap method and pitfall trap method. The migration patterns of the wasps and predatory natural enemies between Huapaitian and paddy fields were studied. During the rice growing season, the small bees and spiders in the white fields move to the paddy fields. During the rice harvesting and fallow periods, the small bees and spiders in the rice fields move back to the white fields. Therefore, the rational distribution of rice white rice and rice can effectively increase the population of natural enemy of rice planthoppers in paddy field, and thus enhance the natural control effect of natural enemies on pests.