The experimental results showed that death rate of root cap cells treated with Hm-toxin was highly correlated with the lesion size induced by H. maydis on corn seedling leaves. The coefficient of correlation was more than 0.77 in all the isolates tested.

• 试验结果；供试玉米自交系的根冠细胞死亡率和接种幼苗后形成的病斑大小是高度相关的；两者的相关系数均在0.；77以上。