摘要
从研究稻瘟菌群体致病性的观点出发,10年来测定了湖南稻瘟菌对湖南省主要栽培品种、全国鉴别品种和部分抗病品种的致病频率。根据分离的致病频率将品种分为4组:A.高抗组——致病频率小于5％;B.抗病组——致病频率为5％～15％;C.感病组——致病频率为16％～30％;D.高感组——致病频率大于30％。每组选择5个代表品种,以此作为湖南稻瘟菌群体致病性动态监测模式。同时提出室内人工接种与田间病圃诱发相结合的监测方法,并在分析湖南稻瘟菌群体致病性的向时,提出了当前生产中存在的问题及对策。
To study the population pathogenicity of pyricularia oryzae the virulence frequence (V. F.) of the pathogenic isolates was examined in the past ten years with the Chinese differentials, some resistant and cultivated varieties of rice. The varieties can be divided into 4 groups accordingly: a) Highly resistant, V. F. 5%; b)Resistant, V. F. 6%～15%; c)Susceptible, V. F.16%～30%; d)Highly susceptible, V. F>30%. Five varieties of each group were selected as monitoring model for the population virulence dynamics of the pathogen. A method involving artificial inoculation and disease nursery detection for monitoring is recommended. The paper also discusses the problems in production and their solutions.
关键词
水稻
瘟病
群体
致病性
lowland rice
blast (plant)
colony (algae)
Hunan/population pathogenicity
