抗病性是决定品种适应范围的一个重要因素,因而了解品种资源的抗病性对于培育具有广泛适应性的品种是极为重要的。1973～1980年,我们在内蒙古狼山甜菜试验站对114个国内外品种进行田间抗病性的观察、鉴定(其中102个品种有三年以上的观察、鉴定记载资料)。本文仅就1973、1974、1979年的研究数据(表1),通过方差分析比较品种间对褐斑病田间差异显著程度,并从中选取45个代表不同抗病类型的品种,分别测定叶片气孔数量、气孔大小、病斑坏死面积、扩展圈面积、孢子堆大小、病菌分生孢子在甜菜叶片汁液中萌发 Disease resistance is an important factor that determines the range of adaptation of the cultivars. Therefore, understanding the disease resistance of the cultivars is extremely important for cultivating varieties with wide adaptability. From 1973 to 1980, we conducted field observation and identification of 114 domestic and foreign varieties in Inner Mongolia Sugar Land Beet Experimental Station (102 of them were observed and identified for more than three years). Based on the data of 1973, 1974, and 1979 (Table 1), the variance analysis was used to compare the significant differences among the cultivars in the brown spot disease field. 45 cultivars representing different disease resistance types were selected to determine the leaf stomatal numbers , Stomatal size, necrotic area of ​​lesion, area of ​​expanded ring, size of spore piles, germination of germs of conidia in the juice of beet leaf