随着耕作制度的调整,插花类型田的增多,近些年晚稻螟虫的危害呈上升趋势,在一些地方,三化螟已成为晚稻主要虫害之一。在防治上应根据危险生育期,幼虫盛孵期和防治指标,巧用农药防治。三化螟蚁螟孵出后,先在本株上爬行分散,或沿着叶片向茎基部爬行,咬孔蛀入稻茎。或爬至叶尖后吐丝下垂,随风飘散到邻近稻株,咬孔蛀入。晚稻在分蘖期稻株组织柔嫩,叶鞘色裹松驰,叶鞘脉 With the adjustment of tillage system and the increasing number of flower arrangement fields, the harm of late rice stem borers is on the rise in recent years. In some places, the stem borer has become one of the major pests in late rice. In the prevention and control should be based on the risk of growth period, larvae Sheng hatching and control indicators, clever use of pesticide control. After the stem borer Chilo suppressalis hatch, first crawl on the plant dispersed, or crawling along the leaves to the base of the stem, bite hole into the rice stems. Or climb to the tip after the silk drooping, wind drift to the adjacent rice plants, bite hole eaten. Late rice at the tillering stage of rice plant tissue soft, leaf sheath sheath wrapped loose, leaf sheath vein