稻瘿蚊在我区近两年已上升为重要的水稻害虫,1976年只在局部县、社发生,1977年则在许多县、社普遍而严重地为害中稻和晚稻.计中稻受害标葱率20%以上的占全区中稻面积的78%,其中特别严重、标葱过半的中稻田近50%,晚稻前期受害株10%以上的稻田达55万亩,对生产威胁很大. Rice gall midge has risen to be an important pest in rice in recent two years in our country and only occurred in some counties and communes in 1976. In 1977, many middle-counties and communes commonly and severely damaged middle and late rice. More than 20% of the total area is 78% of the total area of ​​medium-sized rice, of which, it is particularly serious. Nearly 50% of medium-sized paddy field with more than half of standard paddy field and 550,000 hectares of paddy fields with more than 10% of damaged plants in early stage of late rice pose a great threat to production.