单选题 在玉米地中套种的小麦有可能得小麦黄叶病,这种病是由于光照不足造成的,一旦光照充足,比如玉米收割后,症状很快就会消失,且不会影响产量。而小麦锈病是由花斑锈菌引起,如果在病症初起时不及时恰当应对,就会使小麦植株很快枯死。由于小麦锈病和小麦黄叶病初期症状很难区分,所以,在玉米地中套种小麦,必须高度注意小麦锈病的定期筛查和预防。以下哪项最可能是上述论证的假设前提?

A、 科学家一直没有找到有效鉴别小麦锈病的方法
B、 花斑锈病对小麦的危害与光照是否充足无关
C、 如果及时恰当处理小麦锈病就不会使小麦减产
D、 小麦黄叶病不会诱发小麦锈病
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