Abstract:

With three rice varieties of different resistance to rice blast as the materials, study on mixture inter-planting of different rice varieties to control rice blast and effects on yield and quality of rice in cold region. The results showed that leaf blast and panicle-neck blast could be effectively suppressed under the condition of mixture inter-planting of different resistance to rice varieties in cold region. With the increase in the proportion of resistant rice varieties, the incidence of blast has decreased significantly. The inhibitory effect of different treatments on rice blast was -11.5%～-63.2%. Yields were increased by 1.5%～12.0% after mixture inter-planting of different resistance to rice varieties, and the appearance quality and cooking quality were increased slightly.