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关于天敌对稻纵卷叶螟及稻褐飞虱等的作用和综合防治问题,广东农林学院昆虫学教研组等根据试点进行了分析。为有效地防治水稻害虫,我们结合外地经验,于1979年晚造在孟山大队开展了综合防治试验,并对害虫及其天敌作了较系统的调查观察,取得了良好的效果。孟山大队位于我县东洋(田)边缘,东面临海,三面平原,水田面积1450多亩,水稻病虫历来严重,过去基本上单纯依靠化学农药进行防治。这就使得瓢虫、步甲、隐翅虫、螯蜂和黑肩绿盲蝽等稻田重要天敌数量较少,稻飞虱、稻纵卷叶螟等害虫连年猖獗,每年损失稻谷10万多斤。长期不合理施用农药,除造成天敌严重凋落外,还影响天
On the natural enemies of rice leaf roller and rice brown planthopper, such as the role and comprehensive prevention and control problems, Guangdong Agriculture and Forestry entomology teaching and research group according to the pilot were analyzed. In order to effectively prevent and control rice pests, we combined with field experiences and made comprehensive prevention and control experiments in the Monsanto Brigade in late 1979. We also made systematic investigations on pests and their natural enemies and achieved good results. Monsanto Brigade is located on the edge of Dongyang (Tian) in our county, facing the sea in the east and the plain on three sides. The paddy field covers an area of 1,450 mu. Rice diseases and pests have always been serious. In the past, chemical pesticides were basically used for prevention and treatment. This makes ladybugs, Carabus, Paederus, Chestnut and Apodemus obliquus a small number of important natural enemies of paddy fields, pests such as planthoppers, rice leafrollers rampant year after year, each year the loss of rice more than 100,000 kilosters . Long-term unreasonable pesticide application, in addition to causing serious natural enemies litter, but also affect the day