穗颈瘟是我省晚稻生长后期威胁最大的一种病害,常常在短期内暴发成灾。根据沅江市多年来的实践经验,采取四看四定防治晚稻穗颈瘟的方法,不仅可以提高防治效果,而且还可降低用药成本。 看晚稻品种确定防治重点 品种的抗性强弱,对晚稻穗瘟的发生流行有明显的差异。据了解同一地区,常规稻大面积连续种植6年以上的品种和杂交稻连续种植 Panicle blast is one of the most threatening diseases in the late rice growing season in our province, and it often happens in a short period of time. Yuanjiang City, according to years of practical experience, to take four to see four prevention and control late rice panicle blast method, not only can improve the control effect, but also reduce the cost of medication. The resistance of key cultivars in late-rice varieties was determined by their resistance intensity. There were significant differences in the prevalence of panicle blast in late rice. It is understood that the same area, conventional rice large areas of continuous cultivation of more than 6 years of varieties and continuous cultivation of hybrid rice