早造杂交稻前中期主要虫害有稻纵卷叶螟、叶蝉,特别是5月下旬稻纵卷叶螟普遍发生,后期有稻飞虱;中后期不同程度地发生纹枯病,个别高产试验田有少量稻瘟病和粘虫。加强预测预报,勤查巧治,可治住病虫。幼穗分化期前发 The main pests of hybrid rice in the early middle stage were rice leaf roller and leafhopper, especially in late May, rice leafhopper occurred in the late stage and sheath blight occurred in different degree in the late period. A small amount of rice blast and armyworm. Strengthen forecasting, ground check clever treatment, can cure pests. Spike differentiation before hair