小麦赤霉病是由多种镰孢属 (Ｆｕｓａｒｉｕｍｓｐｐ .)真菌侵染小麦而引起的一种流行性病害。主要发生流行于长江中下游冬麦区和东北春麦区 ,在河南省流行频率较低 ,但如果大流行则造成巨大损失。 1 985年全省大流行 ,发病面积 560 0万亩 ,小麦损失 8.85亿ｋｇ。 1 998年豫北 Wheat scab is an epidemic disease caused by the infection of wheat by several Fusariumspp. Fungi. The prevalence occurred mainly in the winter wheat areas in the middle and lower reaches of the Yangtze River and spring wheat areas in the northeast. The prevalence rate was lower in Henan Province, but caused a huge loss if the pandemic occurred. In 1958, the province had a pandemic with a disease area of ​​560 million mu and wheat loss of 885 million kg. 1998 North Henan