受发病时间和发病速度的影响，不同生长阶段品种间感病程度发生相应变化。
The disease indexes of varieties were varying with growth because of the diseased time and the disease developing speed.
受发病时间和发病速度的影响，不同生长阶段品种间感病程度发生相应变化。
The disease indexes of varieties were varying with growth because of the diseased time and the disease developing speed.
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