水稻纹枯病的为害及满穗防治试验

• 作 者: 李竹苞 应国铭
• 机 构: 浙江省鄞州区下应镇农技站,浙江省鄞州区下应镇农技站 浙江鄞州315104,浙江鄞州315104
• 出 处: 中国植保导刊
• 发表日期: 2004年08期
• 关键词: 水稻纹枯病 满穗 叶鞘 对产量的影响 杂交品种 晚稻 水稻高产 发生为害 稻株 产量下降 障碍 早稻 鄞州 叶片 粒重 考查 腐烂 发病 地区 倒伏

水稻纹枯病在鄞州地区发生为害日趋严重,已成为夺取水稻高产、稳产的主要障碍。一般早稻重于晚稻,晚稻上以杂交品种发病较重。稻株受害后,秕谷增加,千粒重降低,产量下降。据考查,当病斑局限于稻株基部叶鞘时,对产量的影响极小;病斑上升到倒三叶叶鞘,减产9%左右;病斑上升到倒二

Rice sheath blight has become more and more serious in Yinzhou area and has become a major obstacle to the high yield and stable yield of rice. The general early rice heavier than late rice, late rice on the incidence of hybrid varieties heavier. After the rice plant is injured, the trough increases, the grain weight decreases, the output declines. According to the test, when the lesion is limited to the leaf sheath at the base of the rice plant, the effect on the yield is extremely small; the lesion up to the fallen leaf sheath, yield reduction of about 9%; the lesion up to the second