Abstract: Rice stripe viruses (RSV) were inoculated into grain buds of resistant and susceptible varieties with Laodelphax striatallus, 70% of which is viruliferous. It takes three days for resistant varieties to reach almost the highest disease incidences and only two days for the susceptible. At 27-30℃, the disease latent periods of resistant varieties are 10-13 days, the initial and the final disease incidences are 3%-4% and 25%-35%, respectively. These of susceptible varieties are only 5-6 days, their initial and final disease incidences are 28%-33% and 87%-100%, respectively. The susceptible varieties are apt to die and the resistant ones are not when infected by viruses.

Key words: Desease resistance, Laodelphax striatallus, Rice variety

关键词: 抗病性, 水稻, 品种, 条纹叶枯病