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甘肃临夏地区蚕豆叶部病害以轮斑病（ＣｅｒｃｏｓｐｏｒａｚｏｎａｔａＷｉｎｔｅｒ）、普通赤斑病（ＢｏｔｒｙｔｉｓｆａｂａｅＳａｒｄｉ－ｎａ）和灰葡孢赤斑病（ＢｏｔｒｙｔｉｓｃｉｎｅｒｅａＰｅｒｓ）发生为主，损失惨重。病害均形成叶斑、叶枯以至落叶及整株枯死等症状。综合分析表明，病情指数的动态进程基本呈“Ｓ”型曲线，并与病情指数增长率曲线十分接近。此流行规律为指导大田防治提供了科学依据。发病期的日均温、日照时数和平均相对湿度是影响病指增长率的３个主要因子。各时期病指增长率的７３．４％以上是由这３个因子决定的。
The disease of Vicia faba in Linxia region of Gansu province was dominated by Cercospora zonata winter, Botrytis fabae Sardi-na and Botrytis cinerea Pers, with heavy losses. Diseases are the formation of leaf spot, leaf blight and deciduous and whole plant dead and other symptoms. Comprehensive analysis showed that the dynamic process of disease index was basically “S” curve, and with the disease index growth rate curve is very close. This popular law provides a scientific basis for the prevention and control of the field. The average daily temperature, sunshine hours and average relative humidity during the onset period were the three main factors affecting the growth rate of the disease. 73.4% of disease growth rate in each period is determined by these three factors.