大麦黄花叶病是发生在日本麦类作物上病毒病中危害最严重的一种病害。本病其实在大麦秋播阶段业已发生，但通常至翌年2～3月首先在叶片上呈现擦伤状的碎白点花纹并出现坏死病斑，然后全株黄花萎缩。病症严重时全株枯死，颗粒无收。此病都发生在二棱大麦、六棱皮大麦、六棱裸大 Barley yellow mosaic disease is the most serious disease that occurs in the viral diseases of Japanese wheat crops. The disease actually occurred during the autumnal barley stage, but usually the first two to March the following year, the leaves showed scratched white spot pattern and necrosis spots appear, and then the whole plant atrophy. Severe illness when the whole plant died, no crop particles. The disease has occurred in the two barley, six-sided barley, six edges nude