关键词: 稻田, 养鸭, 蚊虫, 控制

Abstract: In both 1979 and 1983, the experimental studies were made to control propagating of mosquito and its larva by running ducks in the rice field in both North Henan Alluvial Plain by Yellow River and South Henan Mountainous Area, where the residents have the habit of farming ducks in the rice field. Such results were achieved: a). The larva control rate ranged from 96.8-98.5% in the former area and in the latter 87.9%. Relative index of the density was 3.3, p<0.001 through the significance test in the both areas, b). Output of the rice increased by 10.2% and c). More than 100 kg duck meat was supplied from each mu(1/15 ha)rice field averagely. This is a measure beneficial to agriculture, duck raise and extermination of mosquito and its larva, and worthy to be spread in the rice growing district.