摘要
根据1985—1986年的试验资料对黄瓜霜霉病流行系统中寄主生长、侵染、显症、病斑扩展、孢囊形成和着落等组分进行了定量分析。结果表明,在所分析的各种因素中,以露时和相对湿度最重要,高温抑病作用亦较明显。本研究还组建了各组分的数学模型。并在建模中作了一些新的尝试,引入了累积湿度、有益湿量、有害湿量和有害温量等新参量。
The epidemic process of cucumber downy mildew was divided intosix parts:host growth,infection,apparition,lesion expansion,sporu-lation and sporangia deposition.Each subprocesses was quantitativelyanalysed and described based on the data of 1985—1986's experiments.Cumulative relative humidity,cumulative beneficial and harmful hu-midity and cumulative harmful temperature were introduced iuto thehost growth and sporulation submodels respectively.D was considereethat disease apparition is related to inoculum,infection probability andcumulative effective temperature.
出处
《植物保护学报》
CAS
CSCD
北大核心
1990年第3期263-268,共6页
Journal of Plant Protection
关键词
黄瓜
霜霉病
流行学
模拟
定量分析
Pseudoperonosporu cubensis——epidemiology——simulation
