摘要
根据单个叶片病斑面积总和与整个叶片面积的比值,以及自然侵染的最高病斑/叶面积比,将大豆灰斑病叶部病害的严重度划分为0～6七个级别,并制出各级别标准图片和绘出模式图。
According to the proportion of the total lesion area to leaf area and the mixmum proportion occurred in naturally infected leaves, severity of the leafspot of frogeye leaf spot disease is graded into 7 classes 0 to 6, and the standard diagram was also provided.
出处
《大豆科学》
CAS
CSCD
北大核心
1991年第4期330-334,共5页
Soybean Science
基金
国家自然科学基金
关键词
大豆
灰斑病
病叶
分级标准
Frogeye leaf spot of Soybean
Grading standard
