1984年5—10月,湘西北双季稻田养鱼,降低了稻田孳生蚊虫及成蚊密度。特别在蚊虫发生季节高峰时期效果明显。7月底、8月初,蚊幼虫的相关密度指数(RPI)分别为23.3和24.6,防制率达76％和70.4％。成蚊的相关密度指数为23.2,防制率为76.8％。稻田养鱼有显著的经济效益,是稻田蚊虫综合防制的有效措施。 From May to October 1984, fish farming in double-cropped paddy fields in northwestern Hunan reduced the density of mosquitoes and adult mosquitos breeding in paddy fields. Especially in the seasonal peak mosquito effect is obvious. At the end of July and early August, the relative density index (RPI) of mosquito larvae was 23.3 and 24.6, respectively, and the control rates were 76% and 70.4% respectively. The relative density index of adult mosquitoes was 23.2 and the control rate was 76.8%. There are significant economic benefits in paddy field fish culture, and it is an effective measure to prevent and control mosquitoes in paddy fields.