利用鲁麦12号和济南13号两个对叶锈病敏感的小麦品种,研究了旗叶空间伸展位置对叶锈病严重度的影响。结果表明:旗叶空间伸展位置对叶锈病严重度有显著的影响,直立叶发病最轻,水平叶发病最重,斜上冲比下披叶片发病轻。根据叶片位置的不同,选择叶片直立的品种,能够提高对空气病源菌的抗性。 Two wheat cultivars, Lumai 12 and Jinan 13, susceptible to leaf rust were used to study the effect of spatial extension of flag leaves on the severity of leaf rust. The results showed that the spatial extension of flag leaves had a significant effect on the severity of leaf rust. The incidence of erect leaves was the lightest, the incidence of horizontal leaves was the heaviest, and the incidence of Phyllostachys pubescens was lighter than that of leaves. Depending on the leaf position, the choice of upright varieties of leaves can increase the resistance to airborne pathogens.