稻瘿蚊是武平县中、晚稻主要害虫之一,主害代第3～5代发生面积常达6000hm2以上。稻瘿蚊虫口密度是以株标葱率来确定的,田间调查需逐丛逐株调查,工作量大。笔者在1993～1995年研究稻瘿蚊标葱空间分布型的基础上,发现株标葱率与丛受害率之间密切相关,其简易估计模型适宜乡(镇)一 Rice gall midge is one of the main pests in middle and late rice in Wuping County. The main damage occurred on the 3rd to 5th generations and the area is often up to 6000hm2. Rice gall mosquito population density is determined by the rate of strain onion plant, field investigation by the cluster by plant investigation, heavy workload. Based on the study of the spatial distribution patterns of M. indicus in 1993-1995, we found that there is a close correlation between the rate of plant-induced onion and the rate of plexus injury. The simple estimation model is suitable for rural (town)