摘要
本文在红三叶白粉(Erysiphe Polygoni DC.)病情田间调查的基础上,分析了发病率、严重度、病情指数与产量损失之间线性关系,并由此建立了红三叶白粉病防治的经济阈值模型。这一模型可为当地红三叶白粉病的防治提供参考。
Based on a field investigation of red clover powdery mildew (Erysiphe polygoni DC.), the linear relationship between the dry matter yield and disease incidence, disease severity and damage index were established by the path coefficient analysis, and a model of economic threshold for the disease control was developed. The model would be helpful to make decision on the disease control.
出处
《草业科学》
CAS
CSCD
北大核心
1991年第5期59-61,共3页
Pratacultural Science
关键词
红三叶白粉病
通径分析
经济阈值
Red clover powdery mildew
path analysis
economic threshold
