The infestation of the disease can not be seen bye eyes.
这种病的感染用肉眼是无法看出来的。
If they are found more than inch from the scalp the infestation is old.
如果他们发现了更多比英寸从头皮虫害是旧。
Heavy infestation can result in severe gill damage, emaciation, anemia and death.
沉重的感染可导致严重的鳃的损害，消瘦，贫血和死亡。
The degree of infestation is obviously different among different spring wheat varieties.
不同的春小麦品种受麦秆蝇为害程度存在着明显的差别。
The degree of infestation is obviously different among different spring wheat varieties.
不同的春小麦品种受麦秆蝇为害程度存在着明显的差别。
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