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疥痂病又称镰刀菌头部凋萎病,危害小麦、大麦以及玉米的穗和茎。科学家们以前认为世界各地的疥痂病都是由一种病原菌引起的。但是新证据表明情况并非如此。迄今获得的DNA数据显示,至少有8种遗传特征不同的疥痂病菌,都称作禾本科镰刀菌。目前种植的多数小麦和大麦品种都很容易染上疥痂病。由这种疾病造成减产和价格损失使美国的麦农在90年代损失了26亿美元。加上近来在亚洲、加拿大、欧洲和美洲造成的损失,疥痂病显然已成为一个世界范围的问题:10年来,它已经成为全世界最主要的植物病害之一。
Scabs, also known as Fusarium head wilt, harm the ears and stems of wheat, barley and corn. Scientists used to think that scabs around the world are caused by a pathogen. But new evidence suggests this is not the case. DNA data so far obtained shows that at least eight different estrus bacteria of a different genetic profile are called Fusarium graminearum. Most current cultivated wheat and barley varieties are prone to scab. The loss of production and price losses caused by this disease caused the U.S. wheat farmers to lose 2.6 billion U.S. dollars in the 1990s. With the recent losses in Asia, Canada, Europe and the Americas, scab has clearly become a worldwide problem: for 10 years it has become one of the leading plant diseases in the world.