小麦纹枯病在我省六十至七十年代曾有轻度发生。近几年来,随着小麦矮秆品种的推广、肥水及种植密度的提高,该病明显上升,危害日趋严重。1987年全省发病面积355.61万亩,占种植面积的19.8%,一般田块病株率在30～40%,严重田块达80%以上,白穗达36.7%。据襄樊市7县(市、区)调查,1986年全市发病面积55.5万亩,1987年上升为167.5万亩,增加了两倍,损失小麦1422.8万公斤,占小麦病虫害总损失的51.58%,成为小麦生产上的一个突出问题。 Wheat sheath blight occurred mildly in the sixties to the seventies of our province. In recent years, with the promotion of wheat dwarf varieties, fertilizer and planting density increased significantly increased the disease, the increasingly serious harm. In 1987, the province had a total area of ​​355.61 million mu, accounting for 19.8% of the total area planted. Generally, the rate of diseased plants in the plots was between 30 and 40%, the number of serious plots was over 80%, and the percentage of white spikes was 36.7%. According to the survey of 7 counties (cities and districts) in Xiangfan City, in 1986, the city’s area of ​​55.5 mu was affected and in 1987 it increased to 1,675,000 mu, doubling the loss of 14,228,000 kg of wheat, accounting for 51.58% of the total loss of wheat diseases and pests, becoming A prominent issue in wheat production.