稻纵卷叶螟是海南省水稻三大害虫之一。自1990年以来,随着耕作制度的改革和杂交水稻大面积的推广,我省晚稻稻纵卷叶螟曾连续三年大发生。1 发生概况为了避过晚稻后期台风的影响和发挥海南冬季优势,发展冬季作物,近年来,海南岛的耕作制度有所改变,双季稻改为一年三熟,因此,把晚稻植期适当提早,感虫型的杂交稻大面积推广,使稻纵卷叶螟连年暴发,为害越来越重,特别是水稻生长前期,遭受台风环流的影响,虫源性质有所改变,虫口密度激增, Rice leaf roller is one of the three major rice pests in Hainan Province. Since 1990, with the reform of the tillage system and the popularization of hybrid rice in large area, the late rice leafroller of late rice in our province occurred for three consecutive years. 1 Occurrence Overview In order to avoid the late typhoon in late rice and to play a winter advantage of Hainan, the development of winter crops, Hainan Island in recent years, farming system has changed, double-cropped rice into three crops a year, therefore, the late rice planting appropriate Early, pest-type hybrid rice popularization in large areas, so that successive years of outbreaks of rice leaf roller, damage more and more heavy, especially in the early rice growth stage, suffered typhoon circulation, insect nature has changed, the population density surge,