直播水稻可节省秧田、工本，尤其适合规模经营、减轻劳动强度，争得季节主动。无锡县1993年直播水稻面积6000多亩，平均亩产超500公斤。但少数承包者因经验不足，或是由于农活繁忙，而忽视了稻象■的防治，造成了严重危害。一、发生与危害特点80年代初，随着“双三制”（水稻一 Direct seeding rice can save seedlings, the cost, especially for large-scale management, reduce labor intensity, win the season initiative. In 1993, Wuxi County broadcasts an area of ​​6000 hectares of rice with an average yield of 500 kilograms per mu. However, a small number of contractors have suffered serious harm due to lack of experience or because of heavy agricultural activities, which have neglected the prevention and control of the Omiya. First, the occurrence and harm characteristics In the early 1980s, with the “double three” (rice one