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在加拿大和美国部分地区小麦赤霉病为害严重,但美国爱达荷州南部对该病最近才有报道。1982年和1984年小麦开花期该州比常年阴雨连绵,赤霉病在中南部、东部的喷灌麦田大流行。发病田全部植株罹病,一些田块减产高达50％。赤霉病是由镰刀菌属若干个种引起的,包括Fusarium graminearum Schwabe., F. Culmorum(W. G. Smith)Sacc., F. nivale(Fr.)Ces.和F.avenaceum(Cordaex Fr.)Sacc。在加拿大和美国中西部F.graminearum是引起小麦穗枯和玉米穗腐的优势种,麦类-玉米
In Canada and parts of the United States, wheat head blight is a serious problem, but it has not been reported recently in southern Idaho. The flowering of the state in 1982 and 1984 than the perennial rainy season, scab in the south-central, east of the sprinkler wheat field pandemic. All the plants in the affected area are sick, some of them yield as much as 50%. Fusarium head blight is caused by several species of the genus Fusarium, including Fusarium graminearum Schwabe., F. Culmorum (W. G. Smith) Sacc., F. nivale (Fr.) Ces. And F.avenaceum (Cordaex Fr.) Sacc. F.graminearum in Canada and the Midwestern United States is the dominant species that causes earring and earring of corn, and wheat-corn