小麦赤霉病是麦类的主要病害之一,尤其是南方麦区,小麦抽穗正值雨季,湿度较高,气温适宜,有利于这种病害的发生和蔓延,1973年曾在全省大流行,病穗率高达65％以上,局部地区达90％以上。常年造成的损失也很大,是小麦高产的重要障碍。其危害的严重性,主要表现在三个方面:一是造成大面积减产,如留作种用出苗差,麦苗 Wheat head blight is one of the main diseases of wheat, especially in the southern wheat area, wheat heading is positive rainy season, high humidity, suitable temperature, is conducive to the occurrence and spread of this disease, in 1973 in the province of pandemic , Ear disease rate as high as 65%, some areas of more than 90%. Perennial losses caused by large, wheat is an important obstacle to high yield. The seriousness of its harm, mainly in three aspects: First, resulting in large-scale production, such as leaving poor seedling emergence, wheat seedlings