论文部分内容阅读
稻瘟病是我市水稻的主要病害,常年都有不同程度的发生,又以早稻发生较为严重。杂交稻“汕优2号”、“汕优6号”等汕优组合于1981年较大面积引进我市,表现高产抗病,但经几年大面积种植后,抗病性严重减退,致使稻瘟病严重发生。为摸清汕优组合抗病性减退的原因及杂交各组合的抗病性,以便因地制宜,制订出有效的综合防治措施,控制杂交稻稻瘟病的为害,市农业局于1984—1985年,根据我市不同地理环境,历史发病情况,分别设立稻瘟病菌生理
Rice blast is the main disease of rice in our city, perennial have different degrees of occurrence, but also to more serious early rice. The hybrid rice “Shanyou 2”, “Shanyou 6” and other combinations of Shanyou introduced in 1981 to a larger area of our city, showing high yield and disease resistance, but after a few years of large area planted, a serious decline in disease resistance, resulting in Rice blast serious occurrence. In order to find out the causes of the decline of disease resistance of combination of Shanyou and the disease resistance of each combination of hybrids, in order to suit local conditions, formulate effective comprehensive prevention and control measures to control the damage of hybrid rice blast, Municipal Bureau of Agriculture in 1984-1985, Different geographical environment in our city, historical incidence, respectively, to establish the physiological characteristics of Magnaporthe grisea