利用抗锈品种防治锈病危害,是保证小麦增产的一项经济有效的措施。但由于锈病生理小种组成的不断变化及品种本身抗锈性的降低,使一个抗锈品种在生产上仅能利用六至十年左右或更短时间。因此抗锈品种选育、布局及分析抗锈性退化原因,必须以生理小种的消长 The use of rust-resistant varieties of rust prevention and control is to ensure that wheat yield a cost-effective measures. However, due to the constant changes in the composition of the races and the reduction of the rust resistance of the cultivars, a rust-resistant variety can only be used for about six to ten years or less in production. Therefore, anti-rust breeding, layout and analysis of the reasons for the degradation of rust must be based on the growth and decline of physiological races