不同种源水稻品种对条纹叶枯病的抗性鉴定与筛选试验

目的]为不同种源水稻品种的抗性鉴定与筛选提供依据。方法]进行江苏省内不同种源晚粳水稻品种自然情况下全生育期发病试验、防治后大田后期发病试验和武进区优质晚粳水稻品种防治后大田期发病试验3、个优质晚粳水稻品种不防治的大田系统病情观察试验。结果]种植抗性较强(如南粳42、华粳6号、南粳44等)的水稻品种,既能大大减少用药次数,避免频繁用药,降低成本,减少面源污染,也能大大减轻条纹叶枯病的危害,特别是在灰飞虱特大发生的年份,种植抗病品种的优势明显。结论]品种抗病性表现与种植地域、种植年份有很大关系。

The Resistance Identification to Stripe Disease of Different Rice Varieties and the Screening Test of Resistant Rice Varieties

Objective] The research aimed to provide references for the resistance identification to stripe disease and screening of different rice varieties.Method] The natural condition of whole growth period pathogenesis experiment and later field pathogenesis experiment after control of different rice varieties in Jiangsu province was carried out.The field pathogenesis experiment after control of high quality late japonica rice and systematic observation on disease in the field experiment without control of three high quality late japonica rice varieties of Wujin district was carried out at the same time.Result] Planting resistance rice varieties such as "Nanjing 42","Huajing 6" and "Nanjing 44"could reduce the frequency of pesticide greatly,reduce the cost and the surface source pollution.It could also reduce the harm of stripe disease,especially in the years of Laodelphax striatellus happening.Conclusion] The manifestations of rice varieties' resistance to disease had great relationship with the plant areas and years.