一、小麦锈病的普遍率、严重度和病情指数的计算方法。小麦锈病发生程度,通常用普遍率、严重度和病情指数表示。为了便于比较各地锈病发生程度,可统一使用以下分级、计算和记载的方法: 普遍率:指锈病发生的普遍程度,即病叶数(条、叶锈病)占总叶数的百分比,或病秆 First, the general rate of wheat rust, severity and disease index calculation method. The degree of occurrence of wheat rust is usually expressed in terms of prevalence, severity and disease index. In order to facilitate the comparison of the degree of occurrence of rust in different places, the following methods of grading, calculating and recording can be used in a unified way: Universal rate refers to the common degree of occurrence of rust disease, that is, the percentage of diseased leaf (leaf rust), the percentage of total leaf,